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? Explanation:
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.  B. Draw a visual model to show how to subtract.
THINK: Do I need to regroup?
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
2 hundreds 3  tens 6 ones left.

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

Question 2. A. Show this problem with a visual model. B. Use your model to explain if you should regroup.   Yes, my visual model matches the regrouping.

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

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. 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.  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.  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.  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. 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.
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.  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.  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.  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.  