We included HMH Into Math Grade 2 Answer Key PDF Module 17 Lesson 2 Represent Regrouping for Subtraction to make students experts in learning maths.
HMH Into Math Grade 2 Module 17 Lesson 2 Answer Key Represent Regrouping for Subtraction
I Can subtract a three-digit number with regrouping using a concrete model or a visual model.
Spark Your Learning
How many nails does Mrs. Orlov have now?
__________ nails
Mrs. Orlov buys 425 nails. She uses 350 nails in a project. How many nails does Mrs. Orlo, have now? Show how you con solve this problem.
Answer:
75 nails
Explanation:
Mrs. Orlov buys 425 nails.
She uses 350 nails in a project.
let n be the nails that Orlo have
n = 425 – 350
425 – 350 = 75
n = 75
75 nails that Mrs. Orlo, have now
Build Understanding
A scientist finds 318 bats in a cave. Then 176 bats fly away. How many bats stay in the cave?
A. Make a concrete model to show 318 bats. Draw a visual model to show your work.
Answer:
B. How con you subtract 176 from 318?
THINK: Do I need to regroup?
Show the subtraction in your visual model. Remember to show any regrouping.
Answer:
We have to regroup in tens place as we cannot subtract 7 from 1
1 becomes 11 after regrouping
11 – 7 = 4
C. Solve the problem.
___________ bats stay in the cave.
Answer:
142 bats stay in the cave.
Explanation:
We have to regroup in tens place as we cannot subtract 7 from 1
1 becomes 11 after regrouping
11 – 7 = 4
Hundreds are regrouped tens so, 3 hundreds become 2 hundred
2 – 1 = 1
Turn and Talk How is 1 hundred regrouped as 10 tens?
Answer:
1 hundred = 10 ones.
10 tens can be regrouped to make a hundred and 10 hundreds can be regrouped to make a thousand.
Step It Out
Question 1.
424 – 251 = _______
A. Draw a visual model to represent 424.
Answer:
B. Do you need to regroup to solve? Explain.
Answer:
Yes, we need to regroup in tens place.
C. Subtract to solve. Draw on your visual model to help you. Remember to record when you regroup.
Answer:
Explanation:
The difference of 424 – 251 = 173
We have to regroup in tens place.
we cannot subtract 5 from 2 so, regrouped 2 as 12
12 – 5 = 7
Check Understanding
Question 1.
There are 238 large marbles and 145 small marbles in a bag. How many more large marbles than small marbles are there? Make a concrete model or draw a visual model to solve.
Answer:
Explanation:
There are 238 large marbles
and there are 145 small marbles in a bag.
238 – 145 = 93
93 more large marbles are there than small marbles
On Your Own
Question 2.
Reason How many more points did the Tigers score than the Eagles? Make a concrete model or draw a visual model to solve.
The Tigers scored _________ more points than the Eagles.
Answer:
The Tigers scored 33 more points than the Eagles.
Explanation:
Points scored by the tigers = 125
Points scored by the Eagles = 92
The difference of 125 and 92 is 33
so, 33 more points than the Eagles.
Question 3.
Open Ended Complete this subtraction problem so that it will require regrouping 1 hundred as 10 tens. Then solve.
Answer:
Explanation:
The numbers choose are 833 and 252
we have to regroup in tens and hundreds place.
1 hundred = 10 ones 8 hundreds will change as 7 hundreds.
833 – 252 = 581
I’m in a Learning Mindset!
What did I learn in addition to regrouping hundreds in subtraction?
Answer:
regrouping is the process of making groups of tens,
when adding or subtracting two digit numbers