We included **HMH Into Math Grade 2 Answer Key PDF** **Module 17 Lesson 6 Add and Subtract Three-Digit Numbers** to make students experts in learning maths.

## HMH Into Math Grade 2 Module 17 Lesson 6 Answer Key Add and Subtract Three-Digit Numbers

I Can regroup to solve addition and subtraction problems with three-digit numbers.

**Step It Out**

Question 1.

Mr. Walker buys a jar of 510 beads. He uses 274 beads to make necklaces to sell. How many beads does Mr. Walker still have?

Answer:

236 beads.

Explanation:

Mr. Walker buys a jar of 510 beads.

He uses 274 beads to make necklaces to sell.

510 – 274 = 236

236 beads that Mr. Walker still have

A. Write the number of beads in the jar to represent the problem.

Answer:

B. Draw a visual model to show how to subtract.

THINK: Do I need to regroup?

Answer:

Yes, we need to regroup,

in ones place we cannot subtract 4 from zero

so, we have to take the carry.

And in tens place we have to take carry from hundreds place.

C. How many hundreds, tens, and ones are left?

________ hundreds _________ tens _________ ones

Answer:

2 hundreds 3 tens 6 ones left.

D. How many beads does Mr. Walker still have?

__________ beads

Answer:

236 beads are still having.

Question 2.

A. Show this problem with a visual model.

Answer:

B. Use your model to explain if you should regroup.

Answer:

C. Add to solve. Record your regrouping.

Answer:

D. Check your work to be sure the addition in your problem matches the addition in your visual model.

Answer:

Yes, my visual model matches the regrouping.

Turn and Talk How is regrouping in addition like regrouping in subtraction? How is it different?

Answer:

**Ones** Place Value

6 + 5 = 11

Put the 1 in Ones place

Carry the 1 to Tens place

**Tens** Place Value

1 + 5 + 9 = 15

Put the 5 in Tens place

Carry the 1 to Hundreds place

**Hundreds** Place Value

1 + 4 + 1 = 6

Put the 6 in Hundreds place

**Check Understanding**

Question 1.

Mrs. Ita puts strings with 400 lights in her yard. She sees that 116 of the lights do not work. How many lights do work? Solve.

_________ lights

Answer:

Explanation:

Mrs. Ita puts strings with 400 lights in her yard.

She sees that 116 of the lights do not work.

400 – 116 = 284

284 lights are working.

**On Your Own**

Question 2.

Use Structure A school of fish swims in the ocean. In this school there are 165 young fish and 357 adult fish. How many fish are in the school? Solve.

There are _________ fish in the school.

Answer:

Explanation:

There are 522 fish in the school.

there are 165 young fish and 357 adult fish.

165 + 357 = 522 fishes.

**Solve. Record any regrouping.**

Question 3.

Answer:

Explanation:

9 is greater than 0 so you must regroup:

Take 1 from 2, so 2 becomes 1.

Add 10 to 0, so 0 becomes 10.

3 is greater than 1 so you must regroup:

Take 1 from 6, so 6 becomes 5.

Add 10 to 1, so 1 becomes 11.

Question 4.

Answer:

Explanation:

**Ones** Place Value

4 + 8 = 12

Put the 2 in Ones place

Carry the 1 to Tens place

**Tens** Place Value

1 + 0 + 7 = 8

Put the 8 in Tens place

**Hundreds** Place Value

1 + 5 = 6

Put the 6 in Hundreds place

Question 5.

Answer:

Explanation:

**Ones** Place Value

0 + 6 = 6

Put the 6 in Ones place

**Tens** Place Value

7 + 5 = 12

Put the 2 in Tens place

Carry the 1 to Hundreds place

**Hundreds** Place Value

1 + 4 + 3 = 8

Put the 8 in Hundreds place

Question 6.

Attend to Precision Circle one of the problems above. Draw a visual model to show how you solved the problem. Record any regrouping.

Answer:

Explanation:

**Ones** Place Value

4 + 8 = 12

Put the 2 in Ones place

Carry the 1 to Tens place

**Tens** Place Value

1 + 0 + 7 = 8

Put the 8 in Tens place

**Hundreds** Place Value

1 + 5 = 6

Put the 6 in Hundreds place

Question 7.

Construct Arguments Lexi and Zach both solved the same subtraction problem, but they got different answers. Check Lexi and Zach’s work.

Who got the right answer? Explain how you know.

Answer:

Zach got right.

Explanation:

In Lexi calculation in hundreds place he subtracted from 5

as he taken carry forward one so, he has to subtract from four

4 – 4 = 0

so, the answer will be 91.

**Solve. Record any regrouping.**

Question 8.

Answer:

Explanation:

**Ones** Place Value

6 + 7 = 13

Put the 3 in Ones place

Carry the 1 to Tens place

**Tens** Place Value

1 + 0 + 8 = 9

Put the 9 in Tens place

**Hundreds** Place Value

6 + 2 = 8

Put the 8 in Hundreds place

Question 9.

Answer:

Explanation:

1 is greater than 0 so you must regroup:

Take 1 from 2, so 2 becomes 1.

Add 10 to 0, so 0 becomes 10.

10 – 1 = 9

1 – 1 = 0

7 – 3 = 4

Question 10.

Answer:

Explanation:

Ones Place Value

0 + 2 = 2

Put the 2 in Ones place

**Tens** Place Value

4 + 7 = 11

Put the 1 in Tens place

Carry the 1 to Hundreds place

**Hundreds** Place Value

1 + 5 + 3 = 9

Put the 9 in Hundreds place

Question 11.

Answer:

Explanation:

9 is greater than 7 so you must regroup:

Take 1 from 5, so 5 becomes 4.

Add 10 to 7, so 7 becomes 17.

17 – 9 = 8

4 – 4 = 0

9 – 2 = 7