Answers

Lesson 1 1. 5

3.

2. 3

6, eight

eight five three seven

9. 5

11. 0

13. 1

15. four

17. tv\/o

19. 0 ,1 ,2 ,3 ,4 ,5

21. 5, 6, 7, 8, 9, 10

23.

10. 3

12. 8

14. two

16. one

18. six/6

20. 10, 9, 8, 7, 6

22. 6 , 5 , 4 , 3 , 2

one four six

three six five

r_f ive^ seven nine six

G? one Q h r e e j two ten

Lesson 2

1. igloos, people

2. fewer

3. more

4.

5.

6.

g lasses \L /6 candle* plates 8

12.

17.

19.

16.

18.

20.

Extra Practice 1A 165

23.

24.

25.

26.

27.

H. bird, nest 5.

6. C 7.

8. D 9.

10. 8 , 7 , 6 , 5 , 1 , 3 11.

12. 5, 6, 7, 8, 9, 10 13.

11. 8 15.

16. 9 17.

18. 5 19.

20. 1

leaf, caterpillar

A

6, 5 ,1 , 3, 2,1

0, 1, 2, 3, 1

8,1, 6, 5, 1 7

6

9

Put on Your Thinking Cap! 1-2. Thinking Skill: Spatial Visualization

Solution:

Thinking Skill: Problem Solving

Strategy: Make a systematic list

Solution:

_ + _ = 5

1 + 1 = 5

3 + 2 = 5

Look at the parts of the whole.

Which port is 1 more than the other?

Jake has 3 bones and Ginger has 2 bones.

( wp:m'f2)

Lesson 1 (Part 1)

1. 3, 5

3. 0

2. 2

1. 1

166 Answers

11. 3 ,2 4, 1 0, 5 Accept all answers.

12. 1,6 2 ,5 3,4 0, 7 Accept any two answers.

13. 1,5 2,4 3, 3 0, 6 Accept any three answers.

Lesson 1 (Part 2)

8. 7 9. 2

Lesson 1 (Part 3)

1 5 2. 3 , 1 or 1, 3

3. 7 4. 1,2 or 2,1

5. 3 1 1 1 , 1 11 I 11 1

Put on Your Thinking Cap! Thinking Skill; Analyzing Parts and Whole

Solution: 1.

Extra Practice lA

168 Answers

3. 3

3 + 4 = 7 7

H. 2 3 2 + 3 = 5 5

Put on Your Thinking Cap! I. Thinking Skill: Logical Reasoning

Solution; Red Green Yellow Blue

2. Thinking Skill: Guess and Check

Solution;

Lesson 1 (Part 1) 1.

2.

Lesson 1 (Part 2)

1.

4. 3 5. 5 6. 1 7. 3

8. 2 9. 5 10. 7 11. 4

12. 8 13. 5 14. 5 15. 1

16. 2 17. 2 18. 5 19. 6

20. 2 21. 7 22. 4 23. 4

24. 6 25. 1 26. 2

2.

3. 4

5. 8 - 1 = - !

6. w-5 = A

7. 6 - o = A

9 - 6 =

9. 1 0 - 6 = - l

10. t - t = -0

11. 8 12. 5 13. 4 14. 3

15. 9 - 6 = 3,3 16. 5 - 3 = 2,2 ( 3 .

Lesson 2 1. 2 , 7 - 2 = 5,5

Lesson 3

1. 9 - 3 = 6,6

3. 6 - 1 = 5, 5

5. 5 - 3 = 2, 2

7. 7 - 2 = 5, 5

Lesson H 1. 6 + 2 = 8

2 + 6 = 8 8 - 2 = 6 8 - 6 = 2

3. 7

2. 7 - 3 = 4, 4

4. 8 - 3 = 5,5

6. 9 - 2 = 7, 7

2. 3 + 1 = 4 1 + 3 = 4 4 - 3 = 1 4 - 1 = 3

4. 4

Extra Practice lA 169

Put on Your Thinking Cap! Thinl

5. triangle

6. circle

7. square or rectangle

Lesson 2 1-6.

cylinder

sphere

cube

pyramid

rectangular prism 6 | \ ^

cone

7.

O 8. stack

9. slide

10. roll

Lesson 3 (Part 1)

1. 10

3. 5

5. triangles: green

7. rectangles: blue

2. 6

H. 2

6. 5

8. 6

Lesson 3 (Part 2)

2. Answers vary

Extra Practice 1A

Lesson H

1. square

3. rectangle

5. square

7.

2. triangle

H. circle

6. circle

10.

Lesson 5 1. 2.

5. Answers vary

Lesson 6 1.

o 4-. Answers vary

6. Answers vary

3. 4.

Put on Your Thinking Cap! Thinl

5. 10

7. seal

9. 7th

11. cat

13. elephant

15. tiger

17. third

19. triangle

21. last

Lesson 2 (Part 2)

1. next to

3. down

5. behind

6. horse

8. 3rd

10. horse

12. horse

IH. camel

16. monkey

18. first

20. square

2. below

^. above

6. in front of

Put on Your Thinking Cap! Thinking Skill: Comparing

Solution: 2 flowers, H flowers, 3 flowers, flower

Lesson 1 1. IH 2. 17 3. 15 1. 13

5. 12 6. 17

7-10.

thirteen

18. 15

19. IH

20. 3

21. 0 r.

^ ^ ^ ^ ^

Lesson 2 1. 1 ten 3 ones

2. 1 ten 6 ones

3. 1 ten 2 ones

Tens Ones

18 1 8

5. Tens Ones

12 1 2

6. Tens Ones

20 2 0

7.

17

8. 10

Lesson 3

1. B, A

5. 13

9. 19

Lesson 4

Tens Ones

1 7

9. 28

2. Set I

6. 18

10. 17

10. 15 11. 19

SetB H. 14

17 8. 16

1.

5.

9.

IH

9

D

2. 18

6. 13

10. 12

15 13. 19

16. 12, 13,15, 17, 19

18. 8,11,13,19

20. 10, 16, 18

22. 18,24

2H. 9

3.

7.

11.

15.

17.

19.

21.

23. 14

25. 16

14

D

19

13

20, 17,15, 11

15, 16, 18

13,9

4. 20

8. B

12. 12

Extra Practice lA 173

Put on Your Thinking Cap!

1. Thinl

12. ff^f.

^ , 0 - 6 = , , , . 2 = 6,6

10 - 6 = 4, 4 + H = 8, 8

6 17

15. m

10 - 8 = 2, 2 + 7 = 9, 9

16. 12

17. 6 @

19. 8 @

21, 3 @

23. 6 ®

® © Lesson 3 1. 1 0 - 2 = 8, i

(10

18. 3 @

® ®

20. 5 @

22. 6 @

24, 8 @

® 0

2. 7 + 6 = 13, 13

3. 1 6 - 4 = 12,12 4. 8 + 12 = 20,20

5. 8 + 4 = 12, 12

Put on Your Thinking Cop! 1. Strategy: Worl< Backwards

Solution: 1 3 - 6 = 7 7 - 4 = 3

Jenny hod 3 marbles.

3 + 5 = 8

May had 8 marbles.

8 + 10 = 18 Albert had 18 marbles.

2. Thinking Skill: Induction and Deduction

Solution: Ben has 8 seashells. 8 + 10 = 18 Caleb has 18 seashells. 1 8 - 6 = 12 Derek has 12 seashells.

Lesson 1

((( [\t>

2.

F l m 1 0

5. Answers vary 6. Answer vary

Lesson 2 1.

A

Extra Practice 1A

2.

3.

10.

H. Pencil A is shorter, than Pencil B. /

5. Pencil D is the shortest.

6. Pencil B is the longest.

7. Bill

9. Joe

11. shortest

13. taller

15. Colin

17. Alice, Colin

18. A

tallest shortest

Lesson 4

1. 6 2. 5

5. Icnife, spoon

7. 5 8. 12

Lesson 5

1. 4

5. 1

9. 6

2. D

6. 2

/ 8. Dan

10. tallest

12. shorter

14. taller, shorter

16. Alice

Lesson 3

1. tack 2. pencil

3. pencil 4. tack

5. foot, leaf, wornn, pen

6. broom, rope, mop, stick

3. 2 4. tongs

6. spoon

9. 3

3. A, B

7. 3

4. 16

8. 9

12. C 13. 13 14. 10 15. 6

16. C 17. B, 2 18. A , D 19. C

20. Plant E 21. 5 22. 9 23. 10

24. A 25. C 26. A , C

Put on Your Thinking Cap! 1. Thinking Skill; Comparing

Solution; Ron; Tower B Sally; Tower A Trent: Tower D Mandy; Tower C

2. Thinking Skill; Spatial Visualization

Solution; 5 + 5 + 5 = 15 15 units

1. C 2. B 3. B 4. A

5. D 6. B 7. C 8. D

9. C 10. D 11. B 12. A

13. A 14. B 15. C 16. C

17. B 18. C 19. B 20. A

21. 25, 12, i 3,6 22. 11 + 2

23. 8 24. 10 25. + 26. Kc

27. Sue 28. Tom 29. size

30.

31.

32.

33. 3 + 6 = 9 / 6 + 3 = 9

34. 9 - 3 = 6 / 9 - 6 = 3

35. 9

36. 8 + 6 = 14, 14

37. 15 - 5 = 10, 10

38. 12 + 4 = 16, 16

39. 2 0 - 8 = 12, 12

40. a. D b.B

176 Answers