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 6.3 Answer Key Use Doubles to Add.

## Texas Go Math Grade 1 Lesson 6.3 Answer Key Use Doubles to Add

**Essential Question**

How can you use doubles to help you add?

Explanation:

To get a double of a number,

we add the same number to itself.

For example, double of 2 is 2 + 2 = 4.

**Explore**

Draw to show the problem.

Write the number of fish.

**Lesson Check**

**For The Teacher**

- Read the following problem. There are 3 orange fish, 3 striped fish, and 1 white fish in the class fish tank. How many fish are in the fish tank?

Answer:

Explanation:

There are 3 orange fish, 3 striped fish,

3 + 3 = 1

and 1 white fish in the class fish tank.

6 + 1 = 7

7 fish are in the fish tank

Math Talk

**Mathematical Processes**

How does knowing 3 + 3 help you solve the problem? Explain.

Explanation:

3 + 3 is known as a double fact

A number is added to itself is called a double fact

**Model and Draw**

How can a doubles fact help you solve 6 + 7?

Explanation:

Explanation:

6 + 7

is made as double plus one

6 + 6 + 1 = 13

**Share and Show**

**Use to model. Make doubles. Add.**

Question 1.

Answer:

Explanation:

9 + 8

is made as double plus one

8 + 8 + 1 = 9

Question 2.

Answer:

Explanation:

5 + 6

is made as double plus one

5 + 5 + 1 = 11

**Problem Solving**

**Use Make doubles. Add.**

Question 3.

Answer:

Explanation:

7 + 8

is made as double plus one

7 + 7 + 1 = 15

Question 4.

Answer:

Explanation:

5 + 4

is made as double plus one

4 + 4 + 1 = 9

Question 5.

**Multi-Step** Mandy has the same number of red and yellow leaves. Then she finds 1 more yellow leaf. There are 17 leaves in all. How many leaves are red? How many leaves are yellow?

_____ red leaves _____ yellow leaves

Answer:

8 red leaves 9 yellow leaves

Explanation:

Total leaves are 17

8 +8 + 1 = 17

Double plus one

so, red leaves are 8 and yellow leaves are 8

added one more yellow leave

8 + 1 = 9

**H.O.T. Multi-Step** Would you use count on or doubles to solve? Explain.

Question 6.

3 + 4

Answer:

Explanation:

3 + 4 is derived as double plus one

3 + 3 + 1 7

Question 7.

3 + 9

Answer:

Explanation:

3 + 9 = 12

started from greater number 9 and counted on

**Daily Assessment Task**

**Choose the correct answer.**

Question 8.

Leo walks in the park. He sees 3 dogs. He sees 3 cats. He sees 1 squirrel. How many animals does Leo see?

(A) 3

(B) 7

(C) 6

Answer: B

Explanation:

Leo walks in the park.

He sees 3 dogs. He sees 3 cats.

3 + 3 = 6

He sees 1 squirrel.

6 + 1 = 7

7 animals that Leo see

Question 9.

**Analyze** There are 7 birds in a tree. 8 more birds fly over. Which has the same sum as 7 + 8?

(A) 7 + 7 + 1

(B) 8 + 8 + 1

(C) 7 + 7 + 2

Answer: A

Explanation:

There are 7 birds in a tree. 8 more birds fly over.

7 + 7 + 1 = 15

Which has the same sum as 7 + 8

7 + 8 = 15

Question 10.

**Multi-Step** There are 5 white houses. There are 5 yellow houses. There is 1 brown house. How many houses

are there?

(A) 10

(B) 15

(C) 11

Answer: C

Explanation:

There are 5 white houses. There are 5 yellow houses.

5 + 5 = 10

There is 1 brown house.

10 + 1 = 11

11 houses are there

Question 11.

**Texas Test Prep** Which has the same sum as 9 + 8?

(A) 6 + 6 + 2

(B) 1 + 8 + 8

(C) 2 + 8 + 8

Answer: B

Explanation:

1 + 8 + 8 =17

9 + 9 = 17

Both the sums are same.

**Take Home Activity**

- Ask your child to show you how to use what he or she knows about doubles to help solve 6 + 5.

### Texas Go Math Grade 1 Lesson 6.3 Homework and Practice Answer Key

**Make doubles. Add.**

Question 1.

Answer:

Explanation:

6 + 7

is made as double plus one

6 + 6 + 1 = 13

Question 2.

Answer:

Explanation:

4 + 5

is made as double plus one

4 + 4 + 1 = 5

**Problem Solving**

**Make doubles. Show how you find the sum.**

Question 3.

There are 4 ants on the step. 5 more ants join them. How many ants are on the step?

___ + ____ + ____ = ____ ants

Answer:

4 + 4 + 1 = 9

Explanation:

4 + 5 is changed as double plus one.

**Texas Test Prep**

**Lesson Check**

**Choose the correct answer.**

Question 4.

Toby finds 6 red pencils and 6 blue pencils. Then he finds 1 yellow pencil How many pencils does Toby find?

(A) 12

(B) 13

(C) 7

Answer: B

Explanation:

Toby finds 6 red pencils and 6 blue pencils.

6 + 6 = 12

Then he finds 1 yellow pencil

12 + 1 = 13

13 pencils that Toby find

Question 5.

There are 8 fish in a pond. 9 more fish swim by. Which has the same sum as 8 + 9?

(A) 8 + 8 + 1

(B) 9 + 9 + 1

(C) 8 + 8 + 2

Answer: A

Explanation:

There are 8 fish in a pond. 9 more fish swim by.

Which has the same sum as 8 + 9

is 8 + 8 + 1 = 17

Question 6.

**Multi-Step** George has the same number of black shirts as white shirts. Then he gets 1 more white shirt. He has 9 shirts in all. How many shirts are white?

(A) 10

(B) 4

(C) 5

Answer: C

Explanation:

Total shirts are 9

9 is changed as Double plus 1

4 + 4 + 1

White and black shirts are equal

so, 4 each

1 white shirt more

4 + 1 = 5

Question 7.

Which has the same sum as 5 + 6?

(A) 5 + 5 + 1

(B) 6 + 6 + 0

(C) 5 + 6 + 1

Answer: A

Explanation:

5 + 5 + 1 = 11

5 + 6 = 11

double plus one.