We included HMH Into Math Grade 1 Answer Key PDF Module 2 Lesson 1 Represent Subtraction to make students experts in learning maths.
HMH Into Math Grade 1 Module 2 Lesson 1 Answer Key Represent Subtraction
I Can represent subtraction using equations, pictures, and objects.
Spark Your Learning
There are 9 frogs. Then 2 frogs hop away. How many frogs are there now?
How can you use tools to solve the problem?
Answer:
Explanation:
There are 9 frogs
Then 2 frogs hop away
I drew counters 9 counters and marked X on 2 counters
7 counters are left
So, 9 – 2 = 7
Therefore, there are 7 frogs now.
Have children work ¡n pairs and choose tools to solve the problem. Have them draw to show how they solved the problem.
Build Understanding
There are 10 fish in a group. Then 4 fish swim away. How many fish are there now?
A. How can you show the problem?
Answer:
B. How many fish are in the group to start? ____
How many fish swim away? ____
C. How can you write an equation to find the difference?
___ – ___ = ____
D. There are ___ fish now.
Explanation:
There are 10 fish in a group
Then 4 fish swim away
I drew 10 counters
I marked X on 4 counters
6 are left
So, 10 – 4 = 6
Therefore, there are 6 fishes now.
Connect to Vocabulary
4 minus 3 is equal to 1. 4 – 3 = 1 The difference is 1.
Turn and Talk How do you know where to put the numbers in your equation?
12 children are at the beach. 5 children leave. How many children are at the beach now?
A. How can you show the problem?
Answer:
B. Subtract. Write an equation to solve.
C. There are ___ children at the beach now.
Explanation:
12 children are at the beach
5 children leave
I drew 12 counters
I marked X on 5 counters
7 are left
So, 12 – 5 = 7
Therefore, 7 children are at the beach now.
Check Understanding Math Board
Write an equation to solve.
Question 1.
There are 8 balloons. 2 balloons float away. How many balloons are there now?
___ – ___ = ____
___ balloons
Answer:
8 – 2 = 6
6 balloons
Explanation:
There are 8 balloons
2 balloons float away
The subtraction equation that solves the problem is
8 – 2 = 6
So, there are 6 balloons now.
Subtract. Write the difference.
Question 2.
9 – 3 = ___
Answer:
9 – 3 = 6
Explanation:
9 minus 3 is equal to 6
9 – 3 = 6
The difference is 6.
Question 3.
11 – 7 = ___
Answer:
11 – 7 = 4
Explanation:
11 minus 7 is equal to 4
11 – 7 = 4
The difference is 4.
Question 4.
___ = 8 – 5
Answer:
3 = 8 – 5
Explanation:
8 minus 5 is equal to 3
8 – 5 = 3
The difference is 3.
On Your Own
Write an equation to solve.
Question 5.
12 seagulls are on the beach. 8 seagulls fly away. How many seagulls are on the beach now?
___ – ___ = ___
___ seagulls
Answer:
12 – 8 = 4
4 seagulls
Explanation:
12 seagulls are on the beach
8 seagulls fly away
The subtraction equation that solves the problem is
12 – 8 = 4
So, there are 4 seagulls on the beach now.
Question 6.
Open Ended Sue has 8 books. She gives some away. How many books could she have now? Draw to show your thinking.
8 – ___ = ___
___ books
Answer:
Explanation:
8 – 3 = 5
5 books
Explanation:
Sue has 8 books
Think she gave 3 books away
The subtraction equation that solves the problem is
8 – 3 = 5
So, Sue could have 5 books now.
Subtract. Write the difference.
Question 7.
10 – 4 = ___
Answer:
10 – 4 = 6
Explanation:
10 minus 4 is equal to 6
10 – 4 = 6
The difference is 6.
Question 8.
11 – 2 = ___
Answer:
11 – 2 = 9
Explanation:
11 minus 2 is equal to 9
11 – 2 = 9
The difference is 9.
Question 9.
7 – 5 = ___
Answer:
7 – 5 = 2
Explanation:
7 minus 5 is equal to 2
7 – 5 = 2
The difference is 2.
Question 10.
13 – 4 = ___
Answer:
13 – 4 = 9
Explanation:
13 minus 4 is equal to 9
13 – 4 = 9
The difference is 9
Question 11.
10 – 8 = ___
Answer:
10 – 8 = 2
Explanation:
10 minus 8 is equal to 2
10 – 8 = 2
The difference is 2.
Question 12.
9 – 0 = ___
Answer:
9 – 0 = 9
Explanation:
9 minus 0 is equal to 9
9 – 0 = 9
The difference is 9.
Question 13.
___ = 6 – 3
Answer:
6 – 3 = 3
Explanation:
6 minus 3 is equal to 3
6 – 3 = 3
The difference is 3.
Question 14.
___ = 12 – 6
Answer:
6 = 12 – 6
Explanation:
12 minus 6 is equal to 6
12 – 6 = 6
The difference is 6.
Question 15.
___ = 9 – 9
Answer:
0 = 9 – 9
Explanation:
9 minus 9 is equal to 0
9 – 9 = 0
The difference is 0.
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