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## Texas Go Math Grade 2 Lesson 5.4 Answer Key Use Ten to Subtract

**Explore**

Circle to show the amount you subtract for each problem.

Answer

Explanation:

To subtract the numbers on number line we move numbers to the left side of number line.

**FOR THE TEACHER**: Read the following problem. Scott has 13 crayons. He gives 3 crayons to Tyler. How many crayons does Scott have now? Have children circle the part of the blue line segment that shows what is subtracted from the total. Repeat for two more problems.

Answer: 10

Explanation:

Scott has 13 crayons.

He gives 3 crayons to Tyler.

Total number of crayons

13 – 3 = 10

**Math Talk**

**Mathematical Processes**

Describe a pattern in the three problems and answers.

Answer:

In the above three problems total 20 counts are there

for the first problem

out of 20, blue line is drawn up to 13 count, the rest 7 blue line is not extended, then the answer is 20 – 7 = 13

for second problem

out of 20, blue line is drawn up to 17 count, the rest 3 blue line is not extended, then the answer is 20 – 3 = 17

Third problem

out of 20, blue line is drawn up to 12 count, the rest 8 blue line is not extended, then the answer is 20 – 8 = 12

**Model and Draw**

You can subtract in steps to use a tens fact.

So, 14 – 6 = ____________

Answer: 8

14 – 4 = 10

10 – 2 = 8

**Share and Show**

**Show the tens fact you used. Write the difference.**

Question 1.

10 – __________ = __________

Answer: 7

Explanation:

12 – 2 = 10

10 – 3 = 7

Question 2.

10 – __________ = ___________

Answer: 5

Explanation:

11 – 1 = 10

10 – 5 = 5

Question 3.

15 – 7 = __________

10 – __________ = __________

Answer: 8

Explanation:

15 – 5 = 10

10 – 2 = 8

Question 4.

13 – 7 = __________

10 – __________ = __________

Answer: 6

Explanation:

13 – 3 = 10

10 – 4 = 6

**Problem Solving**

**Show the tens fact you used. Write the difference.**

Question 5.

13 – 5 = __________

10 – __________ = __________

Answer: 8

Explanation:

13 – 3 = 10

10 – 2 = 8

Question 6.

15 – 6 = __________

10 – __________ = __________

Answer: 9

Explanation:

15 – 5 =10

10 – 1 = 9

Question 7.

12 – 8 = __________

10 – __________ = __________

Answer: 4

Explanation:

12 – 2 = 10

10 – 6 = 4

Question 8.

14 – 8 = __________

10 – __________ = __________

Answer: 6

Explanation:

14 – 4 = 10

10 – 4 = 6

**Solve. Write or draw to explain.**

Question 9.

**H.O.T.** Beth has a box of 16 crayons. She gives 3 crayons to Jake and 7 crayons to Wendy. How many crayons does Beth have now?

_________ crayons

Answer:

6 crayons

Explanation:

Beth has a box of 16 crayons.

She gives 3 crayons to Jake and 7 crayons to Wendy

3 + 7 = 10

16 – 6 = 10

10 – 4 = 6

Question 10.

**H.O.T. Multi-Step** Chris had 15 stickers. He gave Ann and Suzy each the same number of stickers. Now Chris has 7 stickers.

How many stickers did he give to each girl?

__________ stickers

Answer:

8 stickers

Explanation:

Chris had 15 stickers.

He gave Ann and Suzy each the same number of stickers.

Now Chris has 7 stickers.

Number of stickers he gave to each girl

15 – 5 = 10

10 – 2 = 8

**Daily Assessment Task**

**Choose the correct answer.**

Question 11.

Analyze Tasho found two sea stars. The first sea star had 12 arms. The second sea star had 7 arms. How many more arms did the first sea star have?

(A) 6

(B) 5

(C) 9

Answer:

Option (B)

Explanation:

Analyze Tasho found two sea stars.

The first sea star had 12 arms.

The second sea star had 7 arms.

Number of more arms did the first sea star have

12 – 7 = 5

Question 12.

Apply Mr. Cruz wants to buy 11 postcards. So far, he has found 8 postcards. How many more postcards does Mr. Cruz need to find?

(A) 10

(B) 11

(C) 3

Answer:

Option (C)

Explanation:

Mr. Cruz wants to buy 11 postcards.

he has found 8 postcards.

Number of more postcards does Mr. Cruz need to find

11 – 8 = 3

Question 13.

Meg has 14 shells. That is 6 more shells than Lia has. How many shells does Lia have?

(A) 6

(B) 20

(C) 8

Answer:

Option (B)

Explanation:

Meg has 14 shells.

That is 6 more shells than Lia has.

Number of shells does Lia have in all

14 + 6 = 20

Question 14.

**TEXAS Test Prep** Andy scored 13 points in the first game and 7 points in the second game. How many more points did he score in the first game than in the second game?

(A) 6

(B) 4

(C) 20

Answer:

Option (A)

Explanation:

Andy scored 13 points in the first game and

7 points in the second game.

Number of more points he score in the first game than in the second game

13 – 7 = 6

**TAKE HOME ACTIVITY** • Ask your child to name pairs of numbers that have a difference of 10. Then have him or her write the number sentences.

Answer:

10 and 20 are two numbers that have a difference of 10

20 – 10 = 10

### Texas Go Math Grade 2 Lesson 5.4 Homework and Practice Answer Key

**Show the tens fact you used. Write the difference.**

Question 1.

11 – 5 = __________

10 – __________ = __________

Answer: 6

Explanation:

11 – 1 = 10

10 – 4 = 6

Question 2.

14 – 7 = __________

10 – __________ = __________

Answer: 7

Explanation:

14 – 4 =10

10 – 3 = 7

Question 3.

15 – 8 = __________

10 – __________ = __________

Answer: 7

Explanation:

15 – 5 = 10

10 – 3 = 7

Question 4.

18 – 9 = __________

10 – __________ = __________

Answer: 9

Explanation:

18 – 8 = 10

10 – 1 = 9

**Problem Solving**

**Solve. Write or draw to explain.**

Question 5.

Joan has a box of 14 blue beads. She gives 5 beads to Judy and 5 beads to Sara. How many beads does Joan have now?

_________ beads

Answer:

4 beads

Explanation:

Joan has a box of 14 blue beads.

She gives 5 beads to Judy and 5 beads to Sara.

Number of beads does Joan have now

14 – 5 = 9

9 – 5 = 4

Question 6.

**Multi-Step** Jake had 17 toy cars. He gave Dan and Andy each the same number of toy cars. Now Jake has 5 toy cars. How many toy cars did he give to each friend?

_________ toy cars

Answer:

6 toy cars

Explanation:

Jake had 17 toy cars.

He gave Dan and Andy each the same number of toy cars.

Now Jake has 5 toy cars.

Number of toy cars he give to each friend

17 – 12 = 5

6 toy cars did he give to each friend

**Lesson Check**

**Choose the correct answer.**

Question 7.

On Monday Lynn read 11 pages in her book. On Tuesday she read 9 pages in her book. How many more pages did she read on Monday than on Tuesday?

(A) 2

(B) 20

(C) 8

Answer:

Option (B)

Explanation:

On Monday Lynn read 11 pages in her book.

On Tuesday she read 9 pages in her book.

Number of more pages she read on Monday than on Tuesday

11 + 9 = 20

Question 8.

Carolyn and Lee Ann are collecting pennies. Lee Ann found 16 pennies. That is 8 more pennies than Carolyn found. How many pennies did Carolyn find?

(A) 10

(B) 8

(C) 6

Answer:

Option(B)

Explanation:

Lee Ann found 16 pennies.

8 more pennies than Carolyn found.

Number of pennies Carolyn find

16 – 8 = 8

Question 9.

Ben is buying sailboat pictures on his vacation. He wants to buy 12 different pictures. So for, he has bought 5. How many more sailboat pictures does he need to buy?

(A) 7

(B) 5

(C) 17

Answer:

Option(A)

Explanation:

Ben wants to buy 12 different pictures.

He has bought 5.

Number of more sailboat pictures he need to buy

12 – 5 = 7

Question 10.

Sam has two bags of marbles. The first bag has 13 marbles. The second bag has 9 marbles. How many more marbles does the first bag of marbles have?

(A) 3

(B) 5

(C) 4

Answer:

Option (C)

Explanation:

Sam has two bags of marbles.

The first bag has 13 marbles.

The second bag has 9 marbles.

Number of more marbles the first bag of marbles have

13 – 9 = 4