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LESSON Name 71 Teacher Notes: page 457 • Review Hint #17 “Percent.” • Fractions, Decimals, and Percents • Review “Fraction-Decimal-Percent Equivalents” on page 19 in the Student Reference Guide. • Review reference chart “FractionDecimal-Percent Equivalents.” New Concept • A part of a whole can have different names. • Fractions, decimals, and percents are three ways to name part of a whole. Fraction 1 _ of the circle is shaded. 2 Decimal 0.5 of the circle is shaded. Percent 50% of the circle is shaded. • Fractions, decimals, and percents all have numerators and denominators. Part of a Whole 1 2 Rules to Find Denominator The denominator of a fraction can be any number (except 0) and is expressed as a fraction. The denominator of a decimal number is shown by the number of digits to the right of the decimal point. 0.5 © 2008 Saxon 50% Math Language 5 and ____ 50 Both ___ 10 100 1. are equal to __ 2 • One digit to the right means a denominator of 10. • Two digits to the right means a denominator of 100. • Three digits to the right means a denominator of 1000. The denominator of a percent is always 100. • To write a decimal or a percent as a fraction, find the denominator. 5 0.5 = ___ 10 50 50% = ____ 100 • Remember that your fraction pieces have the fraction name, decimal name, and percent name printed on them. Saxon Math Intermediate 5 SM_H5_AD_L071_FF.indd 463 463 Adaptations Lesson 71 11/5/07 12:58:33 PM New Concept, continued Activity 1 page 459 Using Fractions and Decimals • Use your textbook to complete this activity. Activity 2 page 460 Writing Fractions, Decimals, and Percents Use your textbook to complete this activity. Lesson Practice Use fraction pieces to answer the problems. Remember to write the percent symbol in percent problems. a. Shade 25% of the circle. b. Write both 20% and 0.2 as fractions. The denominator of a percent is 100. 20% = One digit to the right means a denominator of 10. 20% = What decimal part of the circle did you shade? . c. This square is divided into 100 equal parts, and 33 parts are shaded. d. Refer to problem c. Write the shaded portion as a fraction, as a percent, and as a decimal. Compare: 1 __ 3 0.33 0.33 is l than 3_1 fraction: because 3 times 33 parts is percent: parts, which is decimal: Saxon Math Intermediate 5 SM_H5_AD_L071_FF.indd 464 © 2008 Saxon How did you determine the comparison? than the whole square. . 464 Adaptations Lesson 71 11/5/07 12:58:36 PM page 461 Written Practice $7.98 1. $ . 2. (6 × )× = 6 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 3. Martin 5 half-dollars = $1 4. sister (Martin ÷ 2) 5 dollars × next year (sister + 1) half-dollars in $1 as Since Martin is t old as his sister, I used the equation m= half-dollars in $5 . © 2008 Saxon Use work area. 5. 6. factors of 7: rolls × 40 each + , How many factors are there? Saxon Math Intermediate 5 SM_H5_AD_L071_FF.indd 465 465 Adaptations Lesson 71 11/5/07 12:58:39 PM page 462 Written Practice, continued 7. not equal to 2_1 6 A ___ 12 1 __ B 2 7 ___ 1 __ 15 2 C 8 ___ 1 __ 16 2 D 9 ___ 1 __ 18 2 8. “Faster” means fewer seconds. Allison Amy _1 2 of 60 seconds 28.72 seconds Half a minute is equal to and 28.72 seconds is seconds, l than seconds. was faster because she swam for fewer seconds. Use work area. 10. thousandths place 9. mixed number and decimal number 1.234 1 2 3 . 11. See page 12 in the Student 12. 5_4 of a dollar 100 ¢ © 2008 Saxon Reference Guide. _________ )1 0 0 4 5 . Saxon Math Intermediate 5 SM_H5_AD_L071_FF.indd 466 466 Adaptations Lesson 71 11/5/07 12:58:40 PM page 462 Written Practice, continued ___ 13. Find AC. 14. 12.3 12.30 Label this figure with the information you know. 12.3 A B C 12.30 ? Use work area. 15. $5.37 $8.95 $0.71 + $0.39 16. $60.10 − $48.37 18. $1.75 19. 115¢ + $0.00 © 2008 Saxon 21. $39.00 ÷ 50 = 13 + ____ 14 = 22. ____ 100 100 20. $0.760 × 40 23. Borrow and rename. 3 − 1__ 1 = 7 − 6 __ 5 5 ____ SM_H5_AD_L071_FF.indd 467 $9.840 × 150 − )100 Saxon Math Intermediate 5 17. 467 Adaptations Lesson 71 11/5/07 12:58:42 PM page 463 Written Practice, continued 24. a. Find the function. They are saving their earnings. $ Total Amount Earned Earnings Left After Savings $12 $10 $9 $7 $8 $6 from b. Use your rule from part a to solve. a. 25. Remember to write the dollar or cent sign. Use work area. 26. 1, 3, 9, 27, b. , ,… Is the sequence arithmetic or geometric? or See page 251. Use work area. Use work area. 27. probability 28. Write as unreduced fractions. G 0.4 = P R R R Y Y Y Y P a. yellow 40% = b. not yellow a. b. and Round 1461 to are both names for parallelograms , Use work area. Saxon Math Intermediate 5 SM_H5_AD_L071_FF.indd 468 and then – with perpendicular sides. 468 and 1422 to = s . © 2008 Saxon 30. Round to the nearest ten. 29. Perpendicular is square corners. years Use work area. Adaptations Lesson 71 11/5/07 12:58:44 PM LESSON Name 72 Teacher Notes: page 464 • Review Hint #39 “Area and Perimeter Vocabulary.” • Review “Perimeter, Area, Volume” on page 17 in the Student Reference Guide. • Area, Part 1 New Concept • To find the area of a rectangle, use this formula: A=l×w (Area = length × width) Math Language The area is the number of square units needed to cover a surface. • “Cover” is a keyword for area. • Label area as “square” units. • The abbreviation for “square” is “sq.” Activity page 466 Using Area Models • This activity is optional. Example Area = l × w Area = 3 in. × 2 in. = 6 sq. in. 2 in. 3 in. © 2008 Saxon • To estimate the area of a rectangle, round the length and width before multiplying. Example 12 ft 8 in. 14 ft 3 in. Saxon Math Intermediate 5 SM_H5_AD_L072_FF.indd 469 469 14 ft 3 in. 12 ft 8 in. 14 ft × 13 ft 182 sq. ft Adaptations Lesson 72 11/5/07 1:03:34 PM Lesson Practice What is the area of each rectangle? b. a. 3 ft 3 cm 3 ft 4 cm c. d. 2 in. 2m 5 in. 1m Use the information below to answer problems e–g. Lola’s bedroom is 10 feet wide and 12 feet long. 10 ft 12 ft e. What is the perimeter of Lola’s bedroom? P = 2l + 2w f. Circle the unit used to show the area of Lola’s bedroom. or cubic feet g. What is the area of Lola’s bedroom? A=l×w h. Estimate the area of the classroom floor. Measure the length and width of your © 2008 Saxon square feet classroom to the nearest foot. Saxon Math Intermediate 5 SM_H5_AD_L072_FF.indd 470 470 Adaptations Lesson 72 11/5/07 1:03:37 PM page 469 Written Practice juice boxes 1. × boxes 2. × c price per box $10.00 total cost cents each total cost 4c = 40¢ × =t c= t= Use work area. 3. 4, 5, 8, 9, 12, 13, , , Use work area. 4. To find 3_1, divide by 3. ,… _____ ) à1 4, à3 5, 8, 9, 12, 13,____, ____, ____, ... Use your fraction-decimal-percent pieces. ___ 3 = percent Use work area. 5. 1 meter = 100 centimeters © 2008 Saxon 5 meters = 6. 12.25 centimeters words: Use work area. Saxon Math Intermediate 5 SM_H5_AD_L072_FF.indd 471 471 Adaptations Lesson 72 11/5/07 1:03:39 PM page 469 Written Practice, continued 7. Write a fraction as your answer. 8. factors of 16: 1 = ___ __ 2 12 9. , , , , See page 12 in the Student Reference Guide. . Use work area. 10. Which digit is in the ones place? 11. Write the quotient as a mixed number. 100 ____ 436.2 3 = ___ 13. Label this figure. F 14. $80.00 – $72.47 ? 15. G $4.97 × 6 H 16. 375 × 548 $10.35 $ . $ . $ . +$ . 17. short division _____________ 7 ) $4 Saxon Math Intermediate 5 SM_H5_AD_L072_FF.indd 472 472 0 . 5 3 © 2008 Saxon 12. Find FG. Adaptations Lesson 72 11/5/07 1:03:41 PM page 470 Written Practice, continued 18. Cancel matching zeros. _______ _____ _____ 60 ) 5 3 4 0 3 + 1 __ 1 + 4 __ 4= 20. 3 __ 8 8 8 19. 30m = 6000 ) 6) m= 21. Borrow and rename. 3 – 5 – 1 __ 1 = 7 __ 4 4 22. 55.5 1 + 10 ___ 1 = 1 + 5 ___ 23. 4 ___ 10 10 10 5.55 55.5 05.55 Use work area. 24. Borrow and rename. 1 = 10 – 4 + 1 __ 25. This rectangle is half as wide as it is long. What is the perimeter of the rectangle? 8 © 2008 Saxon cm 1 2 3 4 5 26. Area = length × width Saxon Math Intermediate 5 SM_H5_AD_L072_FF.indd 473 473 Adaptations Lesson 72 11/5/07 1:03:43 PM page 471 Written Practice, continued 27. Label the spinner. 28. Graph the data. 1 A = __ 2 Average Annual Precipitation 1 B = __ 4 14 C=D 12 10 Amount (inches) 8 6 4 bu qu er qu e, N M 2 Al City and State Use work area. Use work area. 29. Round to the nearest dollar. milk 2.59 bread 2.39 cereal 4.89 juice 2.39 11.89 eggs 1.99 butter 2.29 a. b. © 2008 Saxon vitamins c. 30. Count forward by minutes. Saxon Math Intermediate 5 SM_H5_AD_L072_FF.indd 474 474 Adaptations Lesson 72 11/5/07 1:03:44 PM LESSON Name 73 Teacher Note: page 472 • Refer students to “Decimal Arithmetic Reminders Chart” on page 9 in the Student Reference Guide. • Adding and Subtracting Decimal Numbers New Concept • To add or subtract decimal numbers: 1. Line up the decimal points. 2. Fill empty spaces with zeros. 3. Add or subtract digits with the same place value. Example 3 . 45 à6.7 61 6.7 Ľ 3.45 3.25 10.15 • Sometimes you will need to use rounding or compatible numbers to add or subtract decimal numbers. Example Rounding: 14.63 – 8.71 Compatible numbers: 14.5 – 8.5 6.0 14.63 – 8.71 6 14.63 – 8.63 6.00 6 We used 8.63 because it’s compatible nearest half. with 14.63 and close to 8.71. © 2008 Saxon We rounded both numbers to the Saxon Math Intermediate 5 SM_H5_AD_L073_FF.indd 475 475 Adaptations Lesson 73 11/5/07 1:06:40 PM Lesson Practice Add. Fill empty spaces with zeros. a. 3.4 6.7 + 11.3 b. 4.63 2.50 + 0.46 c. 9.62 12.50 + 3.70 0 e. 5.37 − 1.60 f. 0.436 − 0.200 00 Subtract. d. 3.64 − 1.46 Line up the decimal points and solve. Show your work. g. 4.2 + 2.65 = + i. h. 6.75 − 4.5 = 4.20 6.75 − 4.3 3 4.34 Estimate the perimeter of this square. 2.4 cm j. The distance from Rodrigo’s house to school is 0.8 mile. How far does Rodrigo travel going from his house to school and back again? 0.8 mi School © 2008 Saxon Home Saxon Math Intermediate 5 SM_H5_AD_L073_FF.indd 476 476 Adaptations Lesson 73 11/5/07 1:06:43 PM Written Practice 1. page 475 $0.39 00 2. brother 18 Ling ( 2_1 of brother ) sister (Ling − 2) ÷ ( Ling’s sister is )– = years old. Use work area. 3. 33.4 4. Area = length × width to back 40 ft total 30 ft a. 6. _1_ of _1_ = 2 4 © 2008 Saxon 5. Shade these circles. _2_ = 8 percent _1_ = 4 percent b. Think of quarters. Saxon Math Intermediate 5 SM_H5_AD_L073_FF.indd 477 477 Adaptations Lesson 73 11/5/07 1:06:44 PM page 476 Written Practice, continued ___ 7. Find BC. Label the figure. A B ? 8. Write the length and the units in words. C 9. factors of 16: , , , , Cross out the numbers that are not factors of 20. cm 1 2 3 , Use work area. 10. 3y = 12, so y must equal Now what does 2y equal? . 11. 12.0 , 1.20 12.00 1.20 Use work area. with zeros. 13. $6.48 × 9 14. Add digits with the 4.5 + SM_H5_AD_L073_FF.indd 478 $5.00 same place value. 53.46 − 5.70 Saxon Math Intermediate 5 15. 478 − $0.70 4.3 © 2008 Saxon 12. Fill empty spaces Adaptations Lesson 73 11/5/07 1:06:49 PM page 476 Written Practice, continued 16. __________ 5 ) $8 . 6 0 20. 30w = 9870 17. 18. __________ 20 ) $8 . 6 0 1= 21. 12 + 1 __ 378 × 296 19. 1= 22. 12 − 1 __ 2 2 80000 × 500 49 = 49 + ___ 23. ___ 99 99 w= 1 hrs 2 __ 2 24. a. 25. 1 hrs − 1 __ 2 $5.50 total hours worked b. × per hour paid in all First, I a © 2008 Saxon Frequency Bicycle riding 5 Roller-skating 7 Soccer 6 Swimming 10 Walking 5 Basketball 2 Aerobics 4 a. What fraction of the 39 girls chose swimming? the hours b. What fraction of the girls did not choose bicycle riding or rollerskating? that Morgan worked, and then I m the total number of h by his hourly rate. Find the fraction of girls who did choose bicycle riding and roller-skating. 39 Then subtract from __. 39 a. Saxon Math Intermediate 5 SM_H5_AD_L073_FF.indd 479 Type of Exercise b. Use work area. 479 a. b. Adaptations Lesson 73 11/5/07 1:06:51 PM page 477 Written Practice, continued 10 ft 3 in. 26. Estimate the area. 10 ft 3 in. 27. $14. 8 5 ft $ 1 tip is _ of that 5 Area = length × width 28. Draw a rhombus that has a right angle. 29. 7:59:10 is written in hour: minute: second form. Hours See pages 15 and 16 in the Student Reference Guide. Minutes Seconds + Regroup more than 60 minutes as an hour. Use work area. 30. Sketch a line graph to display the data from the table. Hourly Temperatures on Monday Hourly Temperatures on Monday 8:00 a.m. 64 9:00 a.m. 65 10:00 a.m. 67 11:00 a.m. 69 12:00 p.m. 72 1:00 p.m. 76 2:00 p.m. 80 3:00 p.m. 85 86 68 66 64 00 8: am 9: 00 am 00 am © 2008 Saxon Temperature (°F) Temperature (˚F) Time : 10 Time Use work area. Saxon Math Intermediate 5 SM_H5_AD_L073_FF.indd 480 480 Adaptations Lesson 73 11/5/07 1:06:52 PM LESSON Name 74 Teacher Note: page 479 • Review “Equivalence Table for Units” on page 1 in the Student Reference Guide. • Units of Length New Concept • Use the tables below to help convert units of length. Equivalence Table Units of Length U.S. Customary System 12 in. â 1 ft Metric System 10 mm â 1 cm 3 ft â 1 yd 1000 mm â 1 m 5280 ft â 1 mi 100 cm â 1 m 1760 yd â 1 mi 1000 m â 1 km A meter is about 3 inches longer than a yard. 1 yd 1 ft 12 in. 1 ft 12 in. 1 yd 3 ft 36 in. 1 ft 12 in. Example Two yards is how many inches? yd 1 2 = ___ ___ __ 36 in. ? 36 × 2 72 Two yards equals 72 inches. • To estimate equivalent lengths, round or use compatible numbers. © 2008 Saxon Example About how many meters is 197 centimeters? The chart shows that 100 centimeters is the same length as 1 meter. Round 197 centimeters to 200 centimeters. Then divide by 100. 200 centimeters ÷ 100 = 2 meters Saxon Math Intermediate 5 SM_H5_AD_L074_FF.indd 481 481 Adaptations Lesson 74 11/5/07 1:09:22 PM Lesson Practice _1 4 a. How many yards are in one fourth of a mile? 1 _ of 1760 = To find 4, divide by 4. b. Fifty millimeters is how many centimeters? Multiply the loop. Divide by the outside number. cm ____ ? _1_ ___ mm 1 = 50 c. Dyami’s height is 5 feet 1 inch. How many inches tall is he? 1 ft = in. × ( ) + = ______ d. A 10K race is a 10-kilometer race. How many meters is 10 kilometers? km ___ _1_ = 10 ___ m 1 ? ______ e. The length of a pencil is best measured in A centimeters B meters . C kilometers f. The height of a skyscraper is best measured in D feet . A inches Saxon Math Intermediate 5 SM_H5_AD_L074_FF.indd 482 B feet C miles 482 D centimeters © 2008 Saxon A skyscraper is a very tall building. Adaptations Lesson 74 11/5/07 1:09:24 PM page 482 Written Practice (6 × 1. 10 ) × 12 = 2.3 2. 10 + 10 10 10 10 3. . 3 __ 6 4. price per pound 6 ___ 12 _____ ) × 7 pounds $3.43 total cost 7g = g= Use work area. Use work area. 5. Multiply the loop. mc __ 2 1 __ ___ cm 1 = ? 6. Split the difference. Name the point: 7. 11.02 words: • as a fraction. © 2008 Saxon • as a decimal. 0 1 . Saxon Math Intermediate 5 SM_H5_AD_L074_FF.indd 483 483 Use work area. Adaptations Lesson 74 11/5/07 1:09:24 PM page 482 Written Practice, continued 8. Multiply the loop. 9. Find ST. Label the figure. 10. R 11. 7 3 __ + 14 14. 30.1 – 14.2 18. 12 × 12 = 15. S 5 3 ___ 12. 12 5 – 3 ___ 12 with zeros. 4 16. $12.00 $ . $ . $ . $ . $ . 16.2 + 1.25 4384 = 17. _____ 8 ______________ 6 ) $4 T 13. Fill empty spaces 4 1 – 2 __ $12.98 × 40 19. ? 5 . 5 4 20. Write the quotient as a mixed number. 18 ___ 5 = © 2008 Saxon yd __ 3 1 = __ ___ in. 1 ? + $00.00 Saxon Math Intermediate 5 SM_H5_AD_L074_FF.indd 484 484 Adaptations Lesson 74 11/5/07 1:09:26 PM page 483 Written Practice, continued 21. Write a decimal number that is equal to 2.5 and has three decimal places. See Example 1 on page 444. . 22. a. perimeter of square = 4 × side length perimeter = 24 in. each side = in. ? b. Area = length × width area = × a. area = 23. b. Grapes Grapes Per Pound Per Pound Use work area. 24. a. Which street runs straight north and south? Ramona N Tyler y Valle © 2008 Saxon Garvey a. W b. Which street is parallel to Ramona? E S c. Which street is neither perpendicular nor parallel to Garvey? b. c. 25. Z, X, V, T,____, ____, ... OPQRSTUVWXYZ Use work area. Saxon Math Intermediate 5 SM_H5_AD_L074_FF.indd 485 485 Adaptations Lesson 74 11/14/09 12:21:38 AM page 484 Written Practice, continued 27. Shade 2_1. 26. a. One foot is what fraction of a yard? 1 = __ 2 b. One foot is what percent of a yard? a. percent b. 28. 11 10 12 1 11 10 2 9 3 7 6 2 9 4 8 12 1 3 4 8 5 7 6 5 Morning time is Evening time is : : From the morning time to noon is hours and minutes. + hours minutes hours minutes hours minutes hummingbird 29. – hours and 30. 1 mile = minutes. yards _____ ) degrees cooler © 2008 Saxon From noon to the evening time is 1 To find 4_, divide by 4. crocodile Saxon Math Intermediate 5 SM_H5_AD_L074_FF.indd 486 486 Adaptations Lesson 74 11/8/07 1:15:51 PM LESSON Name 75 Teacher Notes: page 485 • Introduce Hint #45 “Improper Fractions.” • Review “Mixed Numbers and Improper Fractions” on page 18 in the Student Reference Guide. • Changing Improper Fractions to Whole or Mixed Numbers • For additional practice, students may complete Targeted Practice 75. New Concept • A proper fraction is less than 1. • An improper fraction is equal to or greater than 1. Less than 1 Equal to 1 Greater than 1 3 __ 4 __ 5 __ 4 4 4 Proper fraction Improper fractions • To convert an improper fraction: 1. Divide the denominator (bottom number) into the numerator (top number). 2. Write the remainder as a fraction. 3. If necessary, add the mixed number to the whole number. Example 3 6 __ 2 6 + 1 __ 6 + 2)3 © 2008 Saxon Convert the improper fraction. 3 __ 2 R1 Write the remainder as a fraction. 1 = 7__ 1 6 + 1 __ 2 Add the mixed number to the whole number. 2 • Think of improper fractions as “top heavy” fractions. Saxon Math Intermediate 5 SM_H5_AD_L075_FF.indd 487 487 Adaptations Lesson 75 11/5/07 1:11:58 PM Lesson Practice Convert each improper fraction. You may use fraction pieces. _____ b. _5_ = 2 ) ) _____ 3 = e. __ 2 ) _____ 10 = h. ___ 3 a. _2_ = 2 ) 9 = d. __ 4 g. _6_ = 3 ) 4 = j. __ 3 _____ ) _____ c. _5_ = 3 ) _____ 3 = f. __ 3 ) i. _4_ = 2 ) _____ ) _____ ) 7 = k. __ 3 _____ _____ _____ _____ ) 15 = l. ___ 4 Add. Simplify each answer. 4= 4 + __ m. __ 5 5 1 + 8 __ 1= 1 + 8 __ n. 8 __ 3 3 3 o. _5_ + _3_ = 8 8 p. 7 _4_ + 8 _7_ = 8 8 q. What is the perimeter of a square with sides 22_1 inches long? 1 2 2 in. 1. $0.49 22$2.10 page 488 $2.39 2. Find the average. 12 13 17 22$2.39 Saxon Math Intermediate 5 SM_H5_AD_L075_FF.indd 488 488 _____ ) © 2008 Saxon Written Practice Adaptations Lesson 75 11/5/07 1:12:01 PM page 488 Written Practice, continued 3. Arrange from least to greatest. , , 32.16 32.61 31.26 31.62 1 2 3 4 4. largest , greatest even − least difference Use work area. 5. mixed number and decimal number 6. 3 __ 4 4 __ 3 7. Write 4.5 with the same number of decimal places as 6.25. See Example 1 on page 444. . Use work area. . 8. Split the difference. Name the point: 0 1 2 • as a mixed number. • as a decimal number. © 2008 Saxon . 9. 1 kilometer = km m 1 __ meters 5 = __ ? Multiply the loop. Saxon Math Intermediate 5 SM_H5_AD_L075_FF.indd 489 489 Adaptations Lesson 75 11/5/07 1:12:02 PM page 489 Written Practice, continued 10. Find PR. P Q R Label the figure. ? 12 ___ 12 11. 12. Fill empty spaces with zeros. 60.45 − −0 I can check my answer using the equation + 13. Add digits with the same = 12 __ 12 . . 14. 3d = $20.01 place value. Multiplication 36 × 9 × 80 = 4.8 + 15. Associative Property of . d= 506 × 478 18. $30.75 × 8 Saxon Math Intermediate 5 SM_H5_AD_L075_FF.indd 490 _____ = 17. 4690 70 19. $10.00 $ . $ . $ . + $ . 490 © 2008 Saxon 16. Adaptations Lesson 75 11/5/07 1:12:04 PM page 489 Written Practice, continued 5= 5 + __ 21. __ 9 9 4= 4 + __ 20. __ 5 5 22. 2 16 __ 3 2 + 16 __ 3 = Convert. Convert. 23. Perimeter = 4 × side length Convert. 12 in. Find the perimeter in inches. Each side is what percent of the perimeter? 24. Area = length × width a. Find the area in square feet. a. b. Find the area in square inches. b. 25. A rhombus has four congruent sides. © 2008 Saxon 26. median middle mode most range span Day Miles Monday 41 Tuesday 67 Wednesday 13 Thursday 44 Friday 25 Use work area. Saxon Math Intermediate 5 SM_H5_AD_L075_FF.indd 491 491 Adaptations Lesson 75 11/5/07 1:12:05 PM Written Practice, continued page 490 27. Use the graph to answer parts a–c. a. range span − Temperature (F) greatest temperature lowest temperature range b. How many months have an average temperature greater than 70ºF? Average Summer Temperatures in Portland, ME 70 69 68 67 66 65 64 63 62 61 60 June July August Month July c. − 47° a. lower b. January c. 28. Name the coin that is equal to half of a half-dollar. 29. Use a centimeter ruler to measure. a. Perimeter = 2l + 2w b. Area = length × width a. b. 30. Richard Detrina Pat 3 more hours than Richard 2 hours less than Detrina A 7+3+2 B 7 − (3 + 2) C (7 + 3) − 2 D 7−3−2 Saxon Math Intermediate 5 SM_H5_AD_L075_FF.indd 492 © 2008 Saxon 7 hours 492 Adaptations Lesson 75 11/5/07 1:12:07 PM