All the solutions provided in McGraw Hill My Math Grade 1 Answer Key PDF Chapter 2 Lesson 2 Model Subtraction will give you a clear idea of the concepts.
McGraw-Hill My Math Grade 1 Answer Key Chapter 2 Lesson 2 Model Subtraction
Explore and Explain
Answer:
Explanation:
There are 10 toys in a toy box
Marty takes 8 toys out of the toy box
Subtract to find
10 – 8 = 2
So, 2 toys are left.
Teacher Directions: Use 
to model. There are 10 toys in a toy box. Marty takes 8 toys out of the toy box. How many toys are left? Write the number.
See and Show
When you know the whole and one part, you can subtract to find the other part.
Use Work Mat 3 and to subtract.
Question 1.
Answer:
Explanation:
The whole is 5 and one part is 4
Subtract 4 from 5
5 – 4 = 1
The other part is 1.
Question 2.
Answer:
Explanation:
The whole is 8 and one part is 6
Subtract 6 from 8
8 – 6 = 2
The other part is 2.
Talk Math
You have 10 counters. 3 are yellow. Tell how you would use the part-part-whole mat to find how many are red. Explain.
Answer:
Explanation:
There are 10 counters
3 are yellow
The whole is 10 and one part is 3
Subtract 3 from 10
10 – 3 = 7
The other part is 7
So, There are 7 red counters..
On My Own
Use Work Mat 3 and 
to subtract.
Question 3.
Answer:
Explanation:
The whole is 8 and one part is 5
Subtract 5 from 8
8 – 5 = 3
The other part is 5.
Question 4.
Answer:
Explanation:
The whole is 7 and one part is 3
Subtract 3 from 7
7 – 3 = 4
The other part is 4.
Question 5.
Answer:
Explanation:
The whole is 9 and one part is 4
Subtract 4 from 9
9 – 4 = 5
The other part is 5.
Question 6.
Answer:
Explanation:
The whole is 4 and one part is 1
Subtract 1 from 4
4 – 1 = 3
The other part is 3.
Question 7.
Answer:
Explanation:
The whole is 6 and one part is 4
Subtract 4 from 6
6 – 4 = 2
The other part is 2.
Question 8.
Answer:
Explanation:
The whole is 5 and one part is 3
Subtract 3 from 5
5 – 3 = 2
The other part is 2.
Question 9.
Answer:
Explanation:
The whole is 10 and one part is 5
Subtract 5 from 10
10 – 5 = 5
The other part is 5.
Question 10.
Answer:
Explanation:
The whole is 7 and one part is 1
Subtract 1 from 7
7 – 1 = 6
The other part is 6.
Problem Solving
Solve. Use Work Mat 3 and 
if needed.
Question 11.
Clara saw 6 eagles on a limb. 2 eagles flew away. How many eagles were left on the limb?
____ eagles
Answer:
Explanation:
Clara saw 6 eagles on a limb
2 eagles flew away
The whole is 6 and one part is 2
Subtract 2 from 6
6 – 2 = 4
The other part is 4
So, 4 eagles were left on the limb.
Question 12.
There are 10 crocodiles in a pond. 3 get out of the pond. How many crocodiles are left in the pond?
______ crocodiles
Answer:
Explanation:
There are 10 crocodiles in a pond
3 get out of the pond
The whole is 10 and one part is 3
Subtract 3 from 10
10 – 3 = 7
The other part is 7
So, 7 crocodiles are left in the pond.
Write Math The whole is 10 and one of the parts is 10. What is the other part? Explain.
_____________________________
_____________________________
_____________________________
_____________________________
Answer:
Explanation:
The whole is 10 and one of the parts is 10
Subtract 10 from 10
That is 0
So, the other part is 0.
McGraw Hill My Math Grade 1 Chapter 2 Lesson 2 My Homework Answer Key
Practice
Use pennies to subtract. Write the number.
Question 1.
Answer:
Explanation:
I used pennies to subtract
The whole is 5
One part is 1
Subtract 1 from 5
5 – 1 = 4
The other part is 4.
Question 2.
Answer:
Explanation:
I used pennies to subtract
The whole is 10
One part is 2
Subtract 2 from 10
10 – 2 = 8
The other part is 8.
Question 3.
Answer:
Explanation:
I used pennies to subtract
The whole is 6
One part is 1
Subtract 1 from 6
6 – 1 = 5
The other part is 5.
Question 4.
Answer:
Explanation:
I used pennies to subtract
The whole is 9
One part is 6
Subtract 6 from 9
9 – 6 = 3
The other part is 3.
Use pennies to subtract. Write the number.
Question 5.
Answer:
Explanation:
I used pennies to subtract
The whole is 7
One part is 6
Subtract 6 from 7
7 – 6 = 1
The other part is 1.
Question 6.
Answer:
Explanation:
I used pennies to subtract
The whole is 8
One part is 4
Subtract 1 from 5
8 – 4 = 4
The other part is 4.
Question 7.
There are 7 monkeys hanging from a branch. 3 monkeys go away. How many monkeys are still on the branch?
______ monkeys
Answer:
Explanation:
There are 7 monkeys hanging from a branch
3 monkeys go away
I used pennies to subtract
The whole is 7
One part is 3
Subtract 3 from 7
7 – 3 = 4
The other part is 4
4 monkeys are still on the branch.
Question 8.
There are 9 apes eating bananas. 1 ape stops eating. How many apes are still eating bananas?
_____ apes
Answer:
Explanation:
There are 9 apes eating bananas
1 ape stops eating
I used pennies to subtract
The whole is 9
One part is 1
Subtract 1 from 9
9 – 1 = 8
The other part is 8.
Vocabulary Check
Circle the correct answer.
sum subtract
Question 9.
You know the whole and one part. You can ________ to find the other part.
Answer:
You know the whole and one part. You can subtract to find the other part.
Math at Home Have your child use small objects such as cereal or beans to model subtraction.