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The First Ten Days – 7th Grade MEAP Review Day 1 Focus: Represent rational numbers as fractions or decimals N.ME.06.05 N.ME.06.06 N.ME.06.07 Understand Rational Numbers and their location on the Number Line N.ME.06.17 N.ME.06.18 N.ME.06.19 N.ME.06.20 Vocabulary: absolute value, additive inverse, compute, decimals, denominator, fractions, integers, negative, negative fraction, number line, numerator, positive, quotient, rational numbers, sign, sum, terminating decimals. Connection: Over the next few weeks we are going to explore concepts from 6th grade math so you can feel confident answering questions on the Math MEAP test. We know that students, who are better prepared, perform better on the test. To be better prepared, we will begin by reviewing fractions and decimals by putting them in order from least to greatest. Then we will discuss opposite numbers (additive inverses) and absolute value. Active Engagement 1: Split your class into two equal groups. Hand out a set of cards to each group and instruct the students to take one card. The objective of the activity is for each group to get the cards in order from least to greatest. As a team, it is up to the students to decide what is the best way to get the rational numbers in order (i.e. convert all to decimals). Each team has the same set of cards so have them line up not facing each other. When the groups are finished have them turn around to face each other and compare their results. Teaching Point 1: Take time now to discuss what methods were used and which of these were the most useful. Be sure to review how to convert fractions to decimals, order rational numbers on a number line, and that a fraction represents division of two integers. Then model how negative fractions can be rewritten: -2 divided by 5 NOT -2 divided by -5 Have students read these fractions out loud. Active Engagement 2: Use the same groups as before and repeat the activity with the second set of cards. Remember each team has the same set of cards so have them line up not facing each other. When the groups are finished have them turn around to face each other and compare their results. Using the teacher set of cards ask both groups where the cards would go in their number line. Give each group some time to figure it out then see if the two groups agree. Teaching Point 2: Additive Inverses Definition of Additive Inverses The Additive Inverse of a number is the opposite of the number. A number and its opposite add up to give zero. They are called additive inverses of each other. Examples of Additive Inverses The additive inverse of 7 is - 7. 7 + (- 7) = 0 The additive inverse of - 2 is 2. -2+2=0 Solved Example on Additive Inverses Which of the following is the additive inverse of the sum of 5 and 8? Choices: A. - 13 B. - 5 C. - 8 D. - 3 Correct Answer: A Solution: Step 1: The sum of 5 and 8 is 13. Step 2: The additive inverse of 13 is - 13. Let's look at the number line: The absolute value of x, denoted "| x |" (and which is read as "the absolute value of x"), is the distance of x from zero. This is why absolute value is never negative; absolute value only asks "how far?", not "in which direction?". This means not only that | 3 | = 3, because 3 is three units to the right of zero, but also that | –3 | = 3, because –3 is three units to the left of zero. It is important to note that the absolute value bars do NOT work in the same way as do parentheses. Whereas –(–3) = +3, this is NOT how it works for absolute value: Simplify –| –3 |. Given –| –3 |, I first handle the absolute value part, taking the positive and converting the absolute value bars to parentheses: –| –3 | = –(+3) Now I can take the negative through the parentheses: –| –3 | = –(3) = –3 Active Engagement 3: Use the set of cards from the previous active engagements to practice additive inverse and absolute value. For example: additive inverse: -0.125 + 1/8 = 0 absolute value: |-0.125| = 0.125 Do additional practice using MEAP released items (see below) or online practice. Online Practice: http://www.ixl.com/math/practice/grade-6-compare-fractions-with-like-and-unlike-denominators http://www.ixl.com/math/practice/grade-6-convert-between-decimals-and-fractions-or-mixednumbers http://www.ixl.com/math/practice/grade-6-understanding-fractions-word-problems http://www.visualfractions.com/Games.htm http://www.ixl.com/math/practice/grade-6-absolute-value-of-rational-numbers 1.6 -4 0.5 SECOND SET!!!!!!! TEACHERS!!! Day 1 – MEAP Released Items Day 1 - 7th Grade First Ten Days Multiple Choice Identify the choice that best completes the statement or answers the question. ____ 1. Which is a correct graph of the number -5? a. b. c. d. ____ 2. Which best represents the location of point A? a. b. c. d. ____ 3. Which decimal number is equivalent to a. b. c. d. ____ 0.003 0.032 0.302 0.320 4. Which fraction is equivalent to 0.875? a. b. ? c. d. ____ 5. Which of the following is equivalent to ? a. b. c. d. ____ 6. Which statement is equivalent to the fraction a. b. c. d. ____ 0.375 0.380 2.667 3.800 ? -2 divided by 7 -2 divided by -7 -7 divided by 2 -7 divided by -2 7. Which is equivalent to -9 divided by 2? a. -18 b. c. d. 18 ____ 8. What is the value of a. -6.42 b. 0 c. 3.21 d. 6.24 ____ 9. Which point appears to be at -4.1 on the number line? a. b. c. d. ? Point A Point B Point C Point D ____ 10. Which two points on the number line appear to have values that have a sum of zero? a. Point L and Point P b. Point N and Point Q c. Point N and Point S d. Point P and Point Q ____ 11. Which best represents the location of point Q? a. b. c. -3 d. -4 ____ 12. Which point appears to be located at a. b. c. d. on the number line below? A B C D ____ 13. Which point on the number line best represents a value of 1 more than -8? a. b. c. d. P Q R S ____ 14. Which of the following is NOT a rational number? a. b. -27 c. d. ____ 15. Which of the following sets contains a negative integer? a. {0, , 1.5, 2} b. {-1, 0, 2, 3} c. { , 0, , 0.99} d. {-1.9, -1.5, -0.99, 0} ____ 16. Which of the following is an integer? a. 0 b. c. d. 0.25 ____ 17. Which of the following is neither negative nor positive? a. -1 b. 0 c. d. 1 ____ 18. What is the value of a. -8 b. c. d. 8 ? Day 1 - 7th Grade First Ten Days Answer Section MULTIPLE CHOICE 1. ANS: STA: 2. ANS: STA: 3. ANS: STA: 4. ANS: STA: 5. ANS: STA: 6. ANS: STA: 7. ANS: STA: 8. ANS: STA: 9. ANS: STA: 10. ANS: STA: 11. ANS: STA: 12. ANS: STA: 13. ANS: STA: 14. ANS: STA: 15. ANS: STA: 16. ANS: STA: 17. ANS: STA: 18. ANS: STA: B N.ME.06.05 C N.ME.06.05 B N.ME.06.06 D N.ME.06.06 A N.ME.06.06 C N.ME.06.07 B N.ME.06.07 B N.ME.06.17 C N.ME.06.17 B N.ME.06.17 C N.ME.06.17 B N.ME.06.17 A N.ME.06.17 A N.ME.06.18 B N.ME.06.19 A N.ME.06.19 B N.ME.06.19 D N.ME.06.20 OBJ: Order rational numbers and place on the number line OBJ: Order rational numbers and place on the number line OBJ: Show rationals as fractions or terminating decimals OBJ: Show rationals as fractions or terminating decimals OBJ: Show rationals as fractions or terminative decimals OBJ: Understand fractions as a quotient of two integers OBJ: Understand fractions as a quotient of two integers OBJ: Locate negative rational numbers on number line OBJ: Locate negative rational numbers on a number line OBJ: Locate negative rational numbers on a number line OBJ: Locate negative rational numbers on number line OBJ: Locate negative rational numbers on number line OBJ: Locate negative rational numbers on number line OBJ: Understand that rationals are quotients of integers OBJ: Understand that 0 is neither negative nor positive OBJ: Understand that 0 is neither negative nor positive OBJ: Understand that 0 is neither negative nor positive OBJ: Know the absolute value of a number