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Lesson 1
turtle
/
9. heavier than; lighter than
10. heavier than; lighter than
11. as heavy as
12. glass; cup
13. papaya; mango
14. 6; 10; B
15. cow, sheep; chick
16. fish; worm; ant
17. squirrel; mouse; ladybug
Lesson 2 1. 3 2. 2 3. 5
4. 6 5. 5 6. 7
7. 8 8. 10 9. 5
10. 2 11. 3 12. 8
13. 7 14. 11 15. pineapple
Lesson 3 1. 8 2. 6 3. 14
4. 10 5. 3 6. 5
7. cereal 8. cereal 9. 6
10. 8 11. 12 12. 14
13. 16 14. 8 15. 12
16. pineapple 17. watermelo
18. 6 19. 2
20. 4 21. scissors
22. book 23. scissors
24. Accept any of these: scissors; pencil cose/book or pencil case; book
25. 3 26. 6
27. 4 28. 9
29. D , B . C A_ heaviest
Put on Your Thinking Cap!
Thinking Skill: Deduction
Solution:
1. 6 2. 10 3. 3
Thinking Skill: Spatial visualization
Solution:
4. puppy 5. hamster
Lesson 1
1. Ann 2. Kim 3. 8
4. 3 5. 5 6. sun
Extra Practice IB 167
7. flower 8. 2
10. H 11. 2
12.
9.
13. mangoes
15. 1
16. strawberries
17. 16
IH. 3
Lesson 2
1. 8
4. 3
6.
2. Jim
5. 1
3.
Ben's Toys
O O o oo o oo oo
M Car Train Teddy bear Robot
Each O stands for 1 toy.
7. cars
10. 10
13. 1
16. 7
Lesson 3 1.
8. 4
11. 4
IH. 3
17. 2
9. 2
12. rainy
15. 3
18. 3
2. 5
5.
' S
Frog n i l
Paper boat 111 3
Fish 7 ^ 5
5 3. 1 4. 9
i ' - /
Pencil III!
Notebook r f w 1 6
Pen 111 3
Sticker 7 ^ 5
notebook
3
7.
9.
5
10.
: Kitten 11 1 3
Puppy 11 2
Parrot 111 3
Goldfish IIII
Animals in a Pet Shop
Kitten
Puppy
Parrot
Goldfish
12.
0 1 2 3 4 5 6 7
Nunnber of Animals
Ways of Going to School
Bus
| . Bicycle
Car
0 1 2 3 t 5 6 7
Number of Friends
13.
IH.
15. Bus
Put on Your Thinking Cap! Thinking Skill: Logical reasoning Solution:
1. rabbit 2. cat
3. 3
Thinking Skill: Spatial visualization
Solution:
4. Bear Family X O O O O
Bear Family Y O O O O O O O O
Bear Family Z o o o o o o
Each O stands for 1 fish.
18
168 Answers
25
27
32
HO
20 = 2 tens 0 ones 20 + 0 = 20
6. 29 = 2 tens 9 ones 20 + 9 = 29
Tens Ones
2 0
Tens Ones
2 9
35 = 3 tens 5 ones 30 + 5 = 35
Tens Ones
3 5
Lesson 3
o o o o o o o
37
H. 26 5. 20 6. 25
7. 34 8. 36 9. 28
10. 33 11. 23
5. 24 6. 37
7. 40 8. 28 21.
9. twenty-two 10. tliirty 22. 11. twenty-nine 12. tliirty-eight 22.
13. thirty-tlnree 14. twenty-five
15. 36 16. 20
17. 7 18. 29
19. 10 20. 20
Lesson 2 1. 2; 3 2. 3;1
3. 24 4. 37
12. 34 ,35 ,36-37 ,38-39 ,40
13. 22 ,24 ,26 ,28 ,30 ,32 ,34
14. 25,24,23,22,21,20,19
15. 40 ,38 ,36 ,34 ,32 ,30 ,28
16. 40 17. IH
18. 29 19. 38
20. Accept any tliree of tiiese: 28; 29; 30; 31; 32; 33; 34
27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37
3 tens 2 ones
f tens
2 tens 8 ones J
S ^ e n s ^ ^ o ^ s O
t tens 0 ones ) 9 more ttion 31
Extra Practice IB 169
26. 29 27. 15
Put on Your Thinking Cap! 1. Thinking Skill: Logical reasoning
Solution:
10
I om Ihe greotest number
15
10
15
2. Thinking Skill: Logical reasoning Solution:
15
t lorn the -i leosl
number
10
16 2 12
6 10 14
8 18 4
Lesson 1
2. f 6 6 \ / 6 6 \ / 6 6 \ 6 6 6 66166] 66\6 66 6 6116 6 16 616 66 \66 \66, i6 61 \6 61 \6 61
J
37
3. 21 + 5 = 2 tens ] one + 5 ones / \ = 2 tens 6 ones
@ 0 = 2 6
4. 3 + 35 = 3 ones + 3 tens 5 ones y \ = 3 tens 8 ones
@ © = 38
5. 26 + 2 = 2 tens 6 ones + 2 ones / \ = 2 tens 8 ones
@ © =28
6. 31 + 4 = 3 tens 1 one + 4 ones / \ = 3 tens 5 ones
^ 0) =35
7. Tens Ones
3 5
+ 4
35
Tens Ones
0 0
170 Answers
Tens Ones
2 1
+ 1 6
21
16
Tens Ones 7
0
—1-
9. 2 3
+ 4
2 7
11. 1 5
+ 2 0
3 5
13. 18 + 21 = 39
10.
+ 2 1
2 9
12. 2 2
+ 1 0
3 2
14. 25 + 13 = 38
1 8
r \ r ^
Lesson 2 1. 24
2. 28 + 8 = 2 tens 8 ones + 8 ones = 2 tens ]6 ones = 36
3. 27 + 6 = 2 tens 7 ones + 6 ones = 2 tens ]3 ones = 33
4. 37 + 3 = 3 tens 7 ones + 3 ones = 3 tens ]0 ones = 40
5. 2 3 6. 1
3 1
4
+ 3 6
4 0
2 7
5
+ 2 5
3 0
9. 1 4
+ 1 9
3 3
11. 1 6
+ 1 8
3 4
13. 22 + 9 = 31
15. 8 + 26 = 34
17. 15 + 16 = 31
19. 33
20.
Lesson 3 1. 2 7 - 4 = 23
2. 19-1 = Tl
(20) ^
3. 3 6 - 4 = 3 2
(30j ^
4. 3 8 - 5 = 33
30 8
10. 2 7
+ 1 7
4 4
12. 2 1
+ 1 9
4 0
14. 28 + 7 = 35
8
16. 18 + 18 = 36
18. 23 + 17 = 40
r ^ 1
21- C i 9 T ^ '
Extra Practice IB
5. TJ -2> = 1 tens 7 ones - 3 ones = 2 tens i ones = 2 i
6. 39 - 6 = 3 tens 9 ones - 6 ones = 3 tens 3 ones = 33
7. 35 - H = 3 tens 5 ones - H ones = 3 tens 1 one = 31
8. 2 tens 8 ones - 1 ones = 2 8 - 4 = 24
9. 3 tens 7 ones - 2 ones = 3 7 - 2 = 35
10. 2 tens 6 ones - 1 ten 1 one = 26-11 = 15
11. Tens Ones 12. Tens
2 8 3
- 6
13. Tens Ones
3 8
- 8__
3 0
15. Tens Ones
3 3
- 2 1
1 2
17. 2 7 - 5 = 22
19. 2 6 - 1 5 =
2 V J
Ones
4
2
14. Tens
3
- 1
Ones
7
5
16. Tens
2
- 1
Ones
9
0
1
18. 3 9 - 7 = 32
20. 38 - 1 2 = 26
8
2
21. 2 4 - 1 4 = 10 22. 35 - 3 0 = 5
Lesson 4 1. 2 4
3.
1 8
3 0
2 2
2 7
7. 3 5
- 1 9
1 6
9. 24 - 9 = 15
26 - 17 = 9
13. 3 4 - 1 8 = 16
3
1 8
2.
1 2
3 2
5
6.
2 7
3 3
1 6
1 7
4 0
1 5
2 5
10. 3 6 - 8 = 28
12. 30-11 = 19
14. 4 0 - 27 = 13
172 Answers
16. 26 17. 28 18. 15
19. 17 20. 9 21. 8
Lesson 5
1. 18 2. 21 3. 17
H. 16 5. 21 6. 19
7. 20
9. 6; 8 10. 7; 9
Lesson 6 1. 2 0 - 6 = 14
Serene has ]H muffins left.
2. 15 + 9 = 24 David has 24 stickers in all.
3. 36 - 12 = 24 Joanne has 24 marbles left.
4. 27 + 8 = 35 Eugene has 35 magnets.
Put on Your Thinking Cop! 1. Thinking Skill: Spatial visualization
Solution: Answers vary. Samples: Add 17, subtract 0.
Add 18, subtract 1. Add 19, subtract 2.
2. Thinking Skill: Comparing Strategy: Make a list Solution: 28 He will be 28 years old in 2012.
3. Thinking Skill: Identifying pattems & relationships Strategy; Look for patterns Solution:
f 38 37 36
36 35 34
34 33 32
32 V
31 30
J
Lesson 1 1. 11 2. 8 3. 15
4. 18 5. 13 6. 17
7. 17 8. 18 9. 12
10. 17 11. 29 12. 29
13. 17 14. 18 15. 29
16. 26 17. 34 18. 36
19. 39 20. 38 21. 28
22. 36 23. 32 24. 27
25. 35 26. 34 27. 23
28. 26
Lesson 2 1. 5 2. 4 3. 7
4. 8 5. 4 6. 8
7. 23 8. 22 9. 21
10. 24 11. 33 12. 31
13. 31 14. 34 15. 11
16. 18 17. 14 18. 25
19. 22 20. 4 21. 9
22. 17 23. 13 24. 5
25. 9 26. 1
Extra Practice IB 173
Put on Your Thinking Cap! 1. Thinl<ing Sl<ill: Identifying patterns &
relationships . Strategy: Look for patterns Solution;
Lesson 3
_ l 1 \ ^
19 2t 29 3H
2. Thinking Skill; Identifying patterns & relationships
Strategy; Look for patterns Solution;
H \ 1 h 10 16 28 to
Thinking Skill; Deduction Strategy: Work backward Solution;
4.
Lesson 1
I. 7
3. August ^, 2009
5. Monday
7. sunnnner
9. Friday
II. 5
13. December 25,2009 IH. January
15. winter
2. Sunday
H. August 13, 2009
6. 31
8. 31
10. Wednesday
12. December 6, 2009
Lesson 2
1. 5 2. 1
H. 11 5. 7
7. 7 o'clock
9. 10 o'clock
3. 3
6. 2
8. 8 o'clock
10. 6 o'clock
2. 8 3. 11
5. 7 6. 12
8. The woman bakes a funny clown at 10 o'clock.
9. The happy clown ran out of the house at half past 11.
10. The clever clown got a ride from the horse at half post 1.
11.
Meg made her sandwiches at
9 o'clock.
Meg bought bread and tuna at 8 o'clock.
Meg read her book under a tree at
3 o'clock.
Meg ate the sandwiches at the
beach at half past 11.
Meg swam in the sea
at half past H.
Meg went to bed at night at half past 11.
174 Answers
Put on Your Thinking Cop! 1. Thinl<ing Skill: Sequencing
Strategy: Make a systematic list Solution: 11; 11
2. Strategy: Guess and check Solution:
5.
3. B
6. C
9. B
2.
5.
C
A
A
I. C
^. B
7. D
10. A
II. 13 12. 6
13. 27
m. twenty-seven
16. Monday
18. 7
20. J9_, _2L, least
21. 36, 33, 30, 2Z, 2 i , 21
22. half past H
23. 3 2 - J l = 18
21. : 0 ' - = 15
15. Wednesday
17. 5
19. 21
25.
27.
29.
30.
26.
28. October; fall
21 - 9 = 15 ]5 muffins are left.
18 + 22 = 10 Jessica counts 10 flowers in all.
spring
Monday
Lesson 1
1. 3
2. 1 tens = 10 = forty 3. 10, . . .20 , •••30,31, 32,33, 31, 35
1. 10, ... 20, ... 30, • • • M - • • • 50, ... 60, 70, ... 80, ... 90, 91, 92, 93, 91, 95, 96, 9Z, 98
6. seventy-six
8. eighty-five
10. ninety-nine
12. 78
11. 9
16. 37
Lesson 2 1. 6; 5
65 = 60 + 5
3. 90; 9, 0 90 = 90 -f 0
7.
9.
11.
forty-three
sixty-seven
86
13. 10
15. 56
2. 7;1 7Lf = 70 + 1
1. Tens . , Ones
Z i p
&&& -
-
Tens
^ ^ 1 ^ 1 ^
Ones
6. 87 = 8 tens 7 ones 80 + 7 = 87
7. 63 = 6 tens 3 ones 60 + 3 = 63
; Tens Ones
8 7
Tens Ones
6 3
Extra Practice IB 175
92 = 9 tens 2 ones 90 + 2 = 92
Tens Ones
9 2
7. 8 + 61 = 69 8. 71 + 1 = 78
2. 65 3. 83
5. 76 6. 82
8. 56 9. 61
n. 98 12. 100
Lesson 3
1. 59
I. 65
7. 96
10. 76
13. 19
II. 19; 62
15. 93; 100
16. 62
17. 8 2 . 7 0 . 1 7 , 32
greatest
18. 30,10, 50, 60, 70
19. 1 2 , 1 1 , 1 6 - ^ 8 , 5 0 , 5 2
20. 71 ,72 ,70 ,68 ,66 ,61
21. 80 ,75 ,70 ,65 ,60 ,55
Put on Your Thinking Cap!
1. Thinl<ing Sl<ill: Deduction Strategy: Solve part of the problem Solution: Sam: 8; Brian: 11; Shawn: 8; 30
Thinking Skill: Deduction Strategy; Make a list Solution:
2. 11 3. 68
Lesson 1 1. 65 + 1 = 69
65, 66, 67, 68- 69
53 + 5 = 58
53, 51, 55, 56, 5Z, 58
7 3
+ 6
7 9
1 0
+ 2 5
6 5
+ 6 2
6 7
3 5
+ 5 3
8 8
9. 20 + 66 = 86
58 + 21 = 79
9
Lesson 2 1. 1 3
5 1
3. 5
+ 6 7
7 2
5. 5 7
+ 3 3
9 0
7. 1 3
+ 1 8
9 1
9. 61 + 16 = 80
( 1 { 8 0
10. 27 + 50 = ZZ
12. 16 + 82 = 98
9 8
2. 5 6
+ 9
6 5
1. 7
+ 1 8
5 5
6. 6 9
+ 2 1
9 3
8. 8 5
+ 1 5
1 0 0
10. 27 + 31 = 61
3
176 Answers
1. H8 + 35 = 83
13. 51 + 29 = 80
15.
16. 82
18. 63
20. 83
22. 100
I CAN DO m
Lesson 3
1. 5 7
- H
5 3
3. 9 9
- 7 0
2 9
12. 26 + 55 = 81
8 8
6
8 2
6 5
3 3
3 2
5. H 5 - 3 = H2 6. 79 - 8 = Z i
7 V J
7. 68 - 50 = 18 8. 86 - 22 = 6H
8 V J
6 H
9. i - 6
t 9 - H m
1 tens 5 ones
8 tens
5 7 - 5
5 tens 2 ones
8 tens 5 ones
10.
Lesson H
1. 7 1
- 6
6 5
3. 5 0
- 1 3
6 2
3 7
24 - 7 = 17
5 H
H. 8 5
- 2 7
5 8
6. 5 6 - 9 = 47
Extra Practice IB
7. 80 - 45 = 35 8. 7 1 - 2 8 = 43 17.
16.
99 -17
Put on Your Thinking Cap! Thinking Skill: Deduction Strategy: Solve port of the problenn Solution: 1. 35 2. 44 3. 67
4. 9 5. 32 6. 23
Thinking Skill: Deduction Strategy: Work backward
7. 34 8. 68
Lesson 1 1. 2 + 2 + 2 + 2 = 8
4 twos = 8 There are 8 frogs in all.
2- l ^ V ® ^ ^ZM^ f C ® ® ^
20; 20
178 Answers
Extra Practice IB 179
2. Thinking Skill: Comparing Strategy: Use a diagram Solution:
19
Lesson 1
@ nickel
H. Answers vary.
5. Answers vary.
6. Answers vary.
7. Answers vary.
8. Answers vary.
Lesson 3 I. 70$
3.
5.
6.
65$
50$
2.
1.
30$
89$
hi v ^ t
7.
Using H coins
Using 6 coins
Using 7 coins
Using 10 coins
Using 12 coins
Using 100 coins
10
12. no 13. yes
180 Answers
8.
9.
10.
11.
12.
Way 1: Answers vary.
Way 2: Answers vary.
Way 1: Answers vary.
Way 2: Answers vary.
Lesson 4 1. 65
3. H0$ + 30$ = ZQ$
5. IOC + 15(t = 55(t He spends 55$.
2. 50$+ 35$ = 85$
H. 20$ + 10$ = 30$ She spends 30$.
6. 20$ + 10$ = 30$ He spends 30$.
8. 65$
10. 22$
12. 60$ -30$ = 30$
9. 22$
11. 75$-60$ =15$
13.
IH.
15.
16.
You Have You Buy : Your Change
OO ruler
50$-H5$ = 5<t
II glue
65(t: - 604: = 5(t
o ® basketball
96i - 90<( = 6<{
/'—'1
book
50<t: - 39<f = n<{
50$ - 25$ - 15$ = 10$ She has ]0$ left.
18. 5$ + 30$ + 8$ = H3$ He spends H3$ in all.
19. H0$-15$ = 25$ Carmen pays 25$ more than Gomez.
20. 15$ + 13$ = 28$ He had 28$ at first.
Put on Your Thinking Cap! Thinking Skill: Comparing Strategy: Guess and check Solution:
1. Robot; building blocks
2. Checkers set; yo-yo
3. Thinking Skill: Deduction Strategy: Use a diagram Solution:
Sarah Amy Neil Pedro
89$ 95$ 70$ 90$
1. u z. B 3. B
H. D 5. D 6. B
7. D 8. A 9. B
10. A 11. D 12. B
13. B IH. C 15. D
16. B 17. B 18. A
19. D 20. A
Extra Practice IB 181
21. forty-eight
22. 69,60,112,37 greatest
2'+. third
25. -
26. +
27. 2
28. point brush
29. H;5
30. A
31. 3 tens 7 ones = 37
35. There ore i groups of 6 bells. 6 + 6 + 6 + 6 = 2 i
36. 100, 96, 92, 88- 80, 76
37. 36
^ © 36 75 67 39.
40. 10
^]. celery
42. 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 40 The monkeys got 40 bananas in all
43. 27(1: + 65(t = 92(1: He had 92(t at first.
She gives her stickers to 5 friends,
b. 4 + 4 + 4 + 4 + 4 = 20 She needs 20 stickers in all.
45. 0 .35 -18 = 17 J7 children are boys,
b. 35 + 6 = 41 There ore 4] children in all.
46. 0 . 7 8 - 2 0 = 58 Peter has 58 stamps,
b. 58 + 5 = 63 John has 63 stamps.
182 Answers
B L A N K
B L A N K
