MTB • Grade 2 • CCSS Answer Key 1

Answer Key

CCSS Activity 1 Student Master (Unit 2, Lesson 2)

Reading and Writing Number Names

1. 14 2. 74 3. 892 4. 63

5. 1,000 6. 556 7. twenty-three

8. thirteen 9. one hundred seventy-nine

10. six hundred sixty-two 11.seven hundred forty-four

12. eighty-nine 13. four hundred fifteen

CCSS Activity 2 Student Master (Unit 2, Lesson 3)

Showing Data on a Picture Graph

Picture graphs will vary.

CCSS Activity 3 Student Master (Unit 3, Lesson 1)

Odd or Even?

1. 11; odd

2. 8; even

3. 8; even

4. 13; odd

5. 12; even

6. 15; odd

Answers will vary for Questions 7–10.

CCSS Activity 5 Student Master (Unit 3, Lesson 3)

Showing Data on a Picture Graph 2

Picture graphs, questions, and answers will vary.

CCSS Activity 6 Student Master (Unit 5, Lesson 2)

Comparing 3-Digit Numbers

1. < 2. > 3. > 4. <

5. < 6. < 7. >

2GRADE

2 MTB • Grade 2 • CCSS Answer Key

CCSS Activity 8 Student Master (Unit 5, Lesson 5)

Solving “Roll-off” Problems

1. 93 − 75 = 18; 18 centimeters

2. 88 − 73 = 15; 15 centimeters

3. 73 + 88 = 161; 161 centimeters

4. 93 + 75 = 168; 168 centimeters

5. Kindra and Scott would have won by 7 centimeters.

CCSS Activity 9 Student Master (Unit 6, Lesson 2)

Adding and Subtracting 100

1. 150; 350

2. 339; 539

3. 493; 693

4. 722; 922

5. 800; 1,000

6. 45; 245

7. 558; 758

8. 290; 490

9. 652; 852

10. 788; 988

CCSS Activity 10 Student Master 1 (Unit 6, Lesson 3)

Comparing Numbers

1. 164 > 158

2. 232 < 251

3. 289 < 293

CCSS Activity 10 Student Master 2 (Unit 6, Lesson 3)

Using Expanded Form

1. 256; 200 + 50 + 6

2. 183; 100 + 80 + 3

3. 222; 200 + 20 + 2

4. 175; 100 + 70 + 5

5. 982; 900 + 80 + 2

6. 754; 700 + 50 + 4

7. 462; 400 + 60 + 2

CCSS Activity 11 Student Master (Unit 6, Lesson 4)

Writing More Numbers

Answers will vary.

MTB • Grade 2 • CCSS Answer Key 3

CCSS Activity 12 Student Master (Unit 6, Lesson 5)

Comparing More Numbers

1. < 2. > 3. =

4. < 5. < 6. >

7. > 8. < 9. >

10. > 11. < 12. <

CCSS Activity 13 Student Master (Unit 7, Lesson 4)

Adding Up to Even Numbers

1. 7 + 7 = 14; even

2. 5 + 5 = 10; even

3. 8 + 9 = 17; odd

4. 7 + 6 = 13; odd

5. 8 + 8 = 16; even

6. Sample answer: When you add two of the same numbers, the sum will be even.

CCSS Activity 14 Student Master (Unit 7, Lesson 5)

What Time Do You …?

Answers will vary.

CCSS Activity 16 Student Master (Unit 9, Lesson 2)

Finding the Total Cost

Answers will vary.

CCSS Activity 17 Student Master (Unit 9, Lesson 4)

Adding Up the Numbers

1. 68

2. 81

3. 88

4. 466

5. 862

CCSS Activity 18 Student Master (Unit 9, Lesson 5)

Adding 3-Digit Numbers

1. 525 2. 661 3. 810

4. 1,140 5. 610

4 MTB • Grade 2 • CCSS Answer Key

CCSS Activity 19 Student Master (Unit 9, Lesson 6)

More Snack Shop Bills

Answers will vary.

CCSS Activity 20 Student Master (Unit 11, Lesson 2)

Subtracting on a Number Line

1. 85 2. 50 3. 26 4. 70 5. 14 6. 26

CCSS Activity 21 Student Master (Unit 11, Lesson 4)

Subtracting 3-Digit Numbers

1. 123 2. 219 3. 685

CCSS Activity 22 Student Master (Unit 11, Lesson 5)

Subtracting 3-Digit Numbers

1. 411 2. 226 3. 287 4. 229 5. 11

6. 199 7. 95 8. 260 9. 97 10. 325

CCSS Activity 23 Student Master (Unit 13, Lesson 4)

Plotting Measurement Data

Answers will vary.

CCSS Activity 24 Student Master (Unit 14, Lesson 2)

Partitioning Circles

Sample answers:

1.

12

12

2.13

13

13

3.14

14

14

14

CCSS Activity 26 Student Master (Unit 16, Lesson 1)

Finding the Total Number of Dots

1. 4 + 4 + 4 = 12 or 3 + 3 + 3 + 3 = 12

2. 2 + 2 + 2 + 2 + 2 = 10 or 5 + 5 = 10

MTB • Grade 2 • CCSS Answer Key 5

3. 2 + 2 + 2 = 6 or 3 + 3 = 6

4. 4 + 4 + 4 + 4 + 4 = 20 or 5 + 5 + 5 + 5 = 20

5. 5 + 5 + 5 + 5 + 5 = 25

CCSS Activity 28 Student Master (Unit 17, Lesson 5)

Measuring and Comparing Lengths

Answers will vary.

CCSS Activity 29 Student Master (Unit 18, Lesson 5)

Animal Lengths

1. 15 inches; 80 − 65 = ?; 65 + ? = 80

2. 16 inches; 36 − 20 = ?; 20 + ? = 36

3. 12 inches; 48 − 36 = ?; 36 + ? = 48

CCSS Activity 30 Student Master (Unit 19, Lesson 1)

Telling and Writing Time

1. 5:05 p.m. 2. 7:30 p.m. 3. 7:45 p.m.

4. 8:35 p.m. 5. 7:20 a.m.

CCSS Activity 31 Student Master (Unit 19, Lesson 2)

Making a Picture Graph

Number of Kids Number of Families with That Number of Kids

1

2

3

4

5

6

7

6 MTB • Grade 2 • CCSS Answer Key

CCSS Activity 32 Student Master 1 (Unit 20, Lesson 1)

Choosing the Right Tool

Answers will vary.

CCSS Activity 32 Student Master 2 (Unit 20, Lesson 1)

Estimating and Measuring Lengths

1. 4 inches 2. 6 inches 3. 3 inches

4. 5 inches 5. Green bean; 1 inch

6. Carrot; 1 inch 7. 10 inches 8. 8 inches

9. Sample answer: No; the banana is one inch longer than her lunchbox.

CCSS Activity 32 Student Master 3 (Unit 20, Lesson 1)

Telling Time to the Nearest Five Minutes

1. 3:25 2. 1:50 3. 10:35

4. 6:15 5. 12:10