# McGraw Hill My Math Grade 2 Chapter 1 Lesson 7 Answer Key Count Bock to Subtract

All the solutions provided in McGraw Hill Math Grade 2 Answer Key PDF Chapter 1 Lesson 7 Count Bock to SubtractÂ will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 2 Answer Key Chapter 1 Lesson 7 Count Bock to Subtract

Explore and Explain

Teacher Directions: Draw a blue box around number 9. Count back 3. Circle that number red. Draw a green box around number 19. Count back 2. Circle that number yellow. Draw a purple box around 14. Count back 1. Circle that number orange.
Explanation:

See and Show

Find 10-3. Use a number line. Count back to subtract.

Count back to subtract. Use the number line.

Question 1.
7 – 3 = ____

Explanation:
For the difference we have to count back ward on the number line
The difference of 7 and 3 is 4
7 – 3 = 4

Question 2.
8 – 1 = ____

Explanation:
For the difference we have to count back ward on the number line
The difference of 8 and 1 is 7
8 – 1 = 7

Question 3.
9 – 2 = ____

Explanation:
For the difference we have to count back ward on the number line
The difference of 9 and 2 is 7
9 – 2 = 7

Question 4.
10 – 2 = ____

Explanation:
For the difference we have to count back ward on the number line
The difference of 10 and 2 is 8
10 – 2 = 8

Question 5.
8 – 2 = ____

Explanation:
For the difference we have to count back ward on the number line
The difference of 8 and 2 is 6
8 – 2 = 6

Question 6.
____ = 7 – 1

Explanation:
For the difference we have to count back ward on the number line
The difference of 7 and 1 is 6
7 – 1 = 6

Talk Math Explain how you count back on a number line to subtract.

On My Own

Count back to subtract. Use the number line.

Question 7.
3 – 2 = _____

Explanation:
For the difference we have to count back ward on the number line
The difference of 3 and 1 is 2

Question 8.
____ = 12 – 3

Explanation:
For the difference we have to count back ward on the number line
The difference of 12 and 3 is 9
12 – 3 = 9

Question 9.
____ = 8 – 3

Explanation:
For the difference we have to count back ward on the number line
The difference of 8 and 3 is 5
8 – 3 = 5

Question 10.
11 – 3 = ____

Explanation:
For the difference we have to count back ward on the number line
The difference of 11 and 3 is 8
11 – 3 = 8

Question 11.
9 – 3 = ____

Explanation:
For the difference we have to count back ward on the number line
The difference of 9 and 3 is 6
9 – 3 = 6

Question 12.
11 – 2 = ___
Explanation:
For the difference we have to count back ward on the number line
The difference of 11 and 2 is 9
11 – 2 = 9

Question 13.

Explanation:
The difference of 9 and 1 is 8
9 – 1 = 8

Question 14.

Explanation:
The difference of 5 and 3 is 2
5 – 3 = 2

Question 15.

Explanation:
The difference of 10 and 1 is 9
10 – 1 = 9

Question 16.

Explanation:
The difference of 4 and 2 is 2
4 – 2 = 2

Question 17.

Explanation:
The difference of 12 and 2 is 10
12 – 2 = 10

Question 18.

Explanation:
The difference of 4 and 3 is 1
4 – 3 = 1

Question 19.

Explanation:
The difference of 8 and 1 is 7
8 – 1 = 7

Question 20.

Explanation:
The difference of 7 and 2 is 5
7 – 2 = 5

Question 21.

Explanation:
The difference of 5 and 2 is 3
5 – 2 = 3

Problem Solving

Question 22.
Tanya has 12 books. She gives 3 away. How many books does she have now?
______ books
9 books.
Explanation:
Tanya has 12 books.
She gives 3 away.
12 – 3 = 9
9 books that she have now.

Question 23.
Hank washes 9 windows at the pet store. He washes 2 windows in the morning. How many windows does he wash in the afternoon?
____ windows

7 windows
Explanation:
Hank washes 9 windows at the pet store.
He washes 2 windows in the morning.
9 – 2 = 7
7 windows that he wash in the afternoon.

Question 24.
The animal shelter had 8 birds were adopted. 3 of the birds were adopted. How many birds were left at the animal shelter?
____ birds