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13
Only about half of the children
living in Haiti can go to school.
Count forward and backward by 3’s to 30.
Count by 25’s to 250.
Practice your I and J flash cards for 5 minutes.
Do Speed Drill 13 on page 84.
Record your score in the graph on page 77.
Between Which Two Tens?
The number line shows tens. The arrow marks 34.
0
10
20
30
40
50
34 is between 30 and 40.
60
70
30
80
34
90
100
40
57
Lesson 13
Write the tens each number comes between.
1.
73
2.
38
29
56
Remember: For facts that subtract 9, the answer is
1 more than subtracting 10.
16 – 7 = 9
Finish the four related facts.
3.
4.
5.
58
7
16
16 – 9 = 7
9
16 –
= 7
9 +
= 16
16 –
=
7 +
=
7
+ 9
27
+ 62
16
– 9
16
– 7
847
–314
9
+ 7
346
+230
6
+ 9
37
+ 59
15
– 6
16
– 7
383
+432
16
– 9
3
2
4
+ 6
Lesson 13
6. There are 36 inches in a yard. There are 12
inches in a foot. How much longer is a yard
than a foot?
Solution
7. James’s math book has 77 pages in it. There are
62 pages in his language arts book. How many
more pages are in math than in language arts?
Solution
inches
pages
Copy the numbers and write the answers.
8.
263 + 13
261 + 11
79 – 6
566 – 10
Write a number sentence.
9. Nine plus six equals fifteen.
Fill in the blanks.
10. 1 pint =
cups
1 quart =
cups
59
Lesson 13
Circle equal groups. Answer the question.
11. Miss Mary checked 6 math tests. 2 of
the test scores were 100%. How many
tests had scores of 100%?
tests
Color the thermometer to show
freezing temperature.
12.
60
50
10
30
0
40
20
10
°F
Draw hands on the clock.
13.
10
11 12 1
9
8
- 10
7
6
5
2
4
3
3:50
°C
Mark the pentagon with a P. Mark the hexagons with an H.
Mark the octagon with an O.
14.
Put an X on the oval.
15.
60
Color
16.
3 of the square red.
Lesson 13
This pictograph shows how many of Miss Mary’s students stayed
home with the flu. Study the graph to answer the questions.
Children Missing From School
17. How many students were
sick on Monday?
Monday
18. How many students were
absent on Wednesday?
Wednesday
students
students
19. How many more children
were absent on Tuesday
than on Friday?
Tuesday
Thursday
Friday
more children
= 1 child
Of the six lunch boxes belonging to the second graders,
1 are blue. Color 1 of the lunch boxes blue.
20.
Draw coins to show two ways to make 9¢.
21.
22.
61
14
You had to learn 26 letters to learn
to read and write. Children in China
must learn 3,500 characters.
Count forward and backward by even numbers to 30.
Practice your G and J flash cards for 5 minutes.
Do Speed Drill 14 on page 84.
Record your score in the graph on page 77.
Add to Check Subtraction
Use addition to check subtraction.
Add the two bottom numbers of a subtraction
problem to check it. If you make no mistakes, the sum
will equal the top number of the subtraction problem.
35
– 12
difference 23
62
23
+ 12
35
sum
Lesson 14
Solve. Check by adding. Check if the sum is the same as the top
number of the subtraction problem.
1.
55
–24
68
–21
31
+24
17 – 8 = 9
Finish the four related facts.
2.
3.
4.
Twins
17
– 9
784
– 61
17 – 9 = 8
9
Related Subtraction
Opposites
8+9=
8
+ 9
8
17
78
–17
Opposites
17
– 8
900
+ 39
9
+ 8
59
+ 38
7
+ 9
16
– 7
473
+394
16
– 9
39
– 20
9
+ 7
44
45
+ 4
63
Lesson 14
5.
“I weigh 73 pounds. How much do you weigh,
David?” asked James.
“I weigh 62 pounds,” answered David.
Solution
How much heavier is James than David?
pounds
Fill in the blanks.
6. 1 foot =
7. 1 meter =
Write
> , < , or =
9. 10
Underline the addends.
Circle the difference.
inches
8.
centimeters
.
8+3
9+8
21
Follow the instructions.
10. Measure line segment AC in inches.
A
9 + 10 = 19
17 – 8 = 9
15
inches
6+9
C
11. Mark another point that is 3 centimeters from point A.
Write B above this point.
12. Circle the odd numbers. Underline the even numbers.
64
31
78
32
15
26
57
Lesson 14
13. Make a tally mark for each difference of 2.
Make a tally mark for those whose difference is not 2.
9
–7
14
–5
8
–6
13
– 11
10
–2
6
–4
7
–5
9
–6
28
– 26
differences not 2
Write the letters to match.
14.
eighths
16.
sixths
15.
A
fifths
differences of 2
B
C
Answer the questions.
17. Which points mark the pentagon?
B
A
C
E
D
65
Lesson 14
Draw coins to show 19¢.
19.
Fill in the blanks.
20. 1 dollar =
21. 1 dollar =
dimes
nickels
1 dollar =
1 dollar =
Write the tens the numbers come between.
22.
23.
pennies
53
28
quarters
19
76
Circle pairs of mittens. Answer the questions.
24. How many pairs of mittens are there?
25. How many mittens are left over?
26. Is 7 an even number or odd number?
66
pairs
even
odd