# Into Math Grade 3 Module 10 Lesson 3 Answer Key Combine Place Values to Subtract

We included HMH Into Math Grade 3 Answer Key PDF Module 10 Lesson 3 Combine Place Values to Subtract to make students experts in learning maths.

## HMH Into Math Grade 3 Module 10 Lesson 3 Answer Key Combine Place Values to Subtract

I Can combine place values and use flexible grouping to subtract 2- and 3-digit numbers.

There were 528 people living in Elk Town. Some people moved away, as shown. How many people are now living in Elk Town? Estimate. Then show two ways you can solve the problem.
Estimation.
528 is rounded to 500
67 is rounded to 100
500 – 100 = 400
There were 528 people living in Elk Town. Some people moved away,
528 – 67 = 461

Turn and Talk How can you use place value to subtract the numbers in the tens place?
By place value we can do mental math’s and found the answer.

Build Understanding

Question 1.
This map shows the populations of Wilton and Lakeside. How many more people live in Wilton? Write an equation. ______________
Estimate: _____________
35 more people live in Wilton.
Estimation:
327 is rounded as 300
292 is rounded as 300
300 – 300 = 0
Let n be the more people of Wilton
n = 327 – 292
n = 35 A. How can you rewrite 327 and 292 using tens and ones?
We can write 327 as 32 tens and 7 ones
292 as 29 tens and 2 ones

B. How can you subtract 327 and 292 using tens and ones? Think: Combine the hundreds and tens places as tens. C. How many more people live in Wilton?
35 people more live in Wilton

D. Why would you combine place values to subtract?
We regroup then we subtract at the place values
If the subtraction is not possible directly.

No my estimation and exact as have a vary
so, my answer is not reasonable.

Turn and Talk Would it be helpful to combine the place values of tens and ones as ones to subtract 327 and 292? Explain.
no, the subtraction becomes impossible if we subtract
we can not regroup easily

Step It Out

Combine place values to find the difference.

Question 2.
300 – 24
Estimate: ___________
A. Since 4 > 0 and 2 > 0, combine the place values of hundreds and tens as tens. Rewrite the numbers as tens and ones.
300 = _______ tens _______ ones
24 = ________ tens ________ ones
300 = 29 tens 10 ones
24 = 2 tens 4 ones

B. Regroup 30 tens as tens and ones.
30 tens = ________ tens _______ ones
30 tens = 29 tens 10 ones

C. Subtract the ones. Record. Subtract the tens. Record.  Think: What is 29 – 2?

Question 3.
682 – 175
Estimate: ____________
A. Since 5 > 2, combine the place values of tens and ones as ones. Rewrite the numbers as hundreds and ones.
682 = _________ hundreds ________ ones
175 = _________ hundred _________ ones
682 is rounded to 700
175 is rounded to 200
700 – 200 = 500
682 = 6 hundreds 82 ones
175 = 1 hundred 75 ones

B. Subtract the ones. Record. Hundreds Subtract the hundreds. Record.
Think: What is 82 – 75?  82 – 75 = 7

Check Understanding

Question 1.
There are 600 people living in Hillside. There are 218 fewer people living in Riverton. How many people live in Riverton? 382 people live in Riverton
Explanation:
There are 600 people living in Hillside.
There are 218 fewer people living in Riverton.
600 – 218 = 382

Question 2.
STEM Water boils at 212°F. Water freezes when its temperature is 180°F lower. At what temperature does water freeze?  Explanation:
Water boils at 212°F. Water freezes
when its temperature is 180°F lower.
212 – 180 = 32°F the water freeze

Attend to Precision Estimate. Then combine place values to find the difference.

Question 3.
Estimate: _________ 528 is rounded 500
453 is rounded to 400
500 – 400 = 100
Explanation: Question 4.
Estimate: ________ 391 is rounded to 400
86 is rounded to 100
400 – 100 = 300 391 is regrouped as 3 hundreds and 91 ones
86 ones
91 – 86 = 5
Explanation: Question 5.
Reason Last year, 471 people came to visit Clark City. Fewer visitors came to Clark City this year, as shown. How many visitors came to Clark City this year?  Explanation:
471 people came to visit Clark City.
132 Fewer visitors came to Clark City this year
471 – 132 = 339
339 visitors came to Clark City this year

Question 6.
Open-Ended Write a word problem for 200 – 96. Then solve.