Refer to our Texas Go Math Grade 1 Answer Key Pdf to score good marks in the exams. Test yourself by practicing the problems from Texas Go Math Grade 1 Lesson 7.1 Answer Key Count Back.

## Texas Go Math Grade 1 Lesson 7.1 Answer Key Count Back

**Essential Question**

How can you count back 1, 2, or 3?

**Home Connection**

- Your child counted back to find the difference. Counting back is a strategy that can be used to help learn subtraction facts.

Explanation:

If we count backward directly we get the answer

no need of again finding the difference

Math Talk

**Mathematical Processes**

Explain why you count back to find the difference.

Explanation:

Explanation:

Counting back is normally the first strategy that students use when they are learning to subtract. Counting back simply means starting with the minuend (the largest number) and counting back to figure out the difference.

**Model and Draw**

You can count back to subtract.

Explanation:

Counted back to find the difference

**Share and Show**

Use

Count back 1, 2, or 3 to subtract. Write the difference.

Question 1.

5 – 1 = ___

Answer:

Explanation:

Counted back to find the difference

The difference of 5-1= 4

Question 2.

___ = 5 – 2

Answer:

Explanation:

Counted back to find the difference

The difference of 3 = 5 – 2

Question 3.

6 – 1 = ___

Answer:

Explanation:

Counted back to find the difference

The difference of 6 – 1 = 5

Question 4.

___ = 6 – 3

Answer:

Explanation:

Counted back to find the difference

The difference of 3 = 6 – 3

Question 5.

7 – 2 = ___

Answer:

Explanation:

Counted back to find the difference

The difference of 7 – 2 = 5

Question 6.

___ = 7 – 3

Answer:

Explanation:

Counted back to find the difference

The difference of 4 = 7 – 3

Question 7.

10 – 1 = ___

Answer:

Explanation:

Counted back to find the difference

The difference of 10 – 1 = 9

Question 8.

___ = 10 – 2

Answer:

Explanation:

Counted back to find the difference

The difference of 8 = 10 – 2

Question 9.

12 – 3 = ___

Answer:

Explanation:

Counted back to find the difference

The difference of 9 = 12 – 3

Question 10.

___ = 8 – 2

Answer:

Explanation:

Counted back to find the difference

The difference of 6 = 8 – 2

Question 11.

4 – 3 = ___

Answer:

Explanation:

Counted back to find the difference

The difference of 4 – 3 = 1

Question 12.

___ = 9 – 1

Answer:

Explanation:

Counted back to find the difference

The difference of 8 = 9 – 1

**Problem Solving**

**Count back 1, 2, or 3. Write the difference.**

Question 13.

9 – 3 = __

Answer:

Explanation:

Counted back to find the difference

The difference of 9 – 3 = 6

Question 14.

___ = 5 – 3

Answer:

Explanation:

Counted back to find the difference

The difference of 5 – 3 = 2

Question 15.

6 – 3 = ___

Answer:

Explanation:

Counted back to find the difference

The difference of 6 – 3 = 3

**Write a subtraction sentence to solve.**

Question 16.

**H.O.T.** Alex subtracts 3 from 10. What is a subtraction sentence he could write?

Answer:

Question 17.

**Multi-Step** Paco has 11 train cars. He puts 2 train cars on the track. How many train cars are off the track?

___ – ___ = ___ train cars

Then Paco puts 1 more train car on the track. How many train cars are off the track now?

___ – ___ = _____ train cars

Answer:

11 – 2 = 9 train cars

9 – 1 = 8 train cars

Explanation:

Paco has 11 train cars. He puts 2 train cars on the track. 9 train cars are off the track

11 – 2 = 9 train cars

Then Paco puts 1 more train car on the track. 8 train cars are off the track now

9 – 1 = 8 train cars

**Daily Assessment Task**

**Use Choose the correct answer.**

Question 18.

There were 7 ladybugs on the leaf. 2 flew away. How many ladybugs are on the leaf now?

(A) 4

(B) 5

(C) 6

Answer: B

Explanation:

There were 7 ladybugs on the leaf. 2 flew away.

7 – 2 = 5

5 ladybugs are on the leaf now

Question 19.

**Use Tools** Jaime has 5 carrots on her plate. She eats 2 carrots. How many are on her plate now?

(A) 1

(B) 2

(C) 3

Answer: C

Explanation:

Jaime has 5 carrots on her plate. She eats 2 carrots.

5 – 3 = 3

3 are on her plate now

Question 20.

**Multi-Step** There are 8 flowers in Sasha’s garden. She picks 1 flower for her father. Then she picks 2 flowers for her mother. How many flowers are in the garden now?

(A) 7

(B) 6

(C) 5

Answer: C

Explanation:

There are 8 flowers in Sasha’s garden. She picks 1 flower for her father.

8 – 1 = 7

Then she picks 2 flowers for her mother.

7 – 2 = 5

5 flowers are in the garden now

Question 21.

**Texas Test Prep** Josh had 9 toy cars. He gave some of them to Paul. Now Josh has 7 toy cars. How many did he give to Paul? Which subtraction sentence answers the problem?

(A) 8 – 1 = 7

(B) 9 – 1 = 8

(C) 9 – 2 = 7

Answer: C

Explanation:

Josh had 9 toy cars. He gave some of them to Paul.

Now Josh has 7 toy cars.

9 – 7 = 2

2 he give to Paul

**Take Home Activity**

- Have your child show how to use the count back strategy to find the difference for 7 – 2. Repeat with other problems to count back 1, 2, or 3 from 12 or less.

### Texas Go Math Grade 1 Lesson 7.1 Homework and Practice Answer Key

**Count back 1, 2, or 3. Write the difference.**

Question 1

8 – 3 = __

Answer:

Explanation:

Counted back to find the difference

The difference of 8 – 3 = 5

Question 2.

6 – 2 = ___

Answer:

Explanation:

Counted back to find the difference

The difference of 6 – 2 = 4

Question 3.

9 – 3 = ___

Answer:

Explanation:

Counted back to find the difference

The difference of 9 – 3 = 6

Question 4.

__ = 10 – 1

Answer:

Explanation:

Counted back to find the difference

The difference of 9 = 10 – 1

Question 5.

___ = 7 – 3

Answer:

Explanation:

Counted back to find the difference

The difference of 7 – 3 = 4

Question 6.

___ = 12 – 2

Answer:

Explanation:

Counted back to find the difference

The difference of 10 = 12 – 2

**Problem Solving**

**Write a subtraction sentence to solve.**

Question 7.

Andrew subtracts 2 from 9. What is a subtraction sentence he could write?

Answer:

9 – 2 = 7

Explanation:

9 -2 = 7 is a subtraction sentence he could write

Question 8.

**Multi-Step** Chelsea has 12 beads. She puts 3 beads on a string. How many beads are off the string?

___ – ___ = ___ beads

Then Chelsea puts 2 more beads on the string. How many beads are off the string now?

___ – ___ = ____ beads

Answer:

12 – 3 = 9 beads

9 – 2 = 7 beads

Explanation:

Chelsea has 12 beads. She puts 3 beads on a string. 9 beads are off the string

12 – 3 = 9 beads

Then Chelsea puts 2 more beads on the string. 7 beads are off the string now

9 – 2 = 7 beads

**Texas Test Prep**

**Lesson Check**

**Choose the correct answer.**

Question 9.

Logan bought 6 books. He gave 3 to his brother. How many books does Logan have now?

(A) 6

(B) 9

(C) 3

Answer: C

Explanation:

Logan bought 6 books. He gave 3 to his brother.

6 – 3 = 3

3 books that Logan have now

Question 10.

There are 8 friends watching a movie. 2 leave to go home. How many friends are watching the movie now?

(A) 6

(B) 5

(C) 10

Answer: A

Explanation:

There are 8 friends watching a movie. 2 leave to go home.

8 – 2 = 6

6 friends are watching the movie now

Question 11.

Which subtraction sentence answers the problem?

Amy had 7 bears. She gave some to Marissa. Now Amy has 4 bears. How many did she give to Marissa?

(A) 7 – 2 = 5

(B) 7 – 3 = 4

(C) 7 – 1 = 6

Answer: B

Explanation:

Amy had 7 bears. She gave some to Marissa. Now Amy has 4 bears.

7 – 3 = 4

4 she give to Marissa

Question 12.

**Multi-Step** Dan makes 9 baskets. He gives 2 to his teacher. Then he gives 1 to his coach. How many baskets does Dan have now?

(A) 6

(B) 8

(C) 7

Answer: A

Explanation:

Dan makes 9 baskets. He gives 2 to his teacher.

9 – 2 = 7

Then he gives 1 to his coach.

7 – 1 = 6

6 baskets that Dan have now