Refer to our Texas Go Math Grade 3 Answer Key Pdf to score good marks in the exams. Test yourself by practising the problems from Texas Go Math Grade 3 Lesson 12.3 Answer Key Divide by 5.

## Texas Go Math Grade 3 Lesson 12.3 Answer Key Divide by 5

**Essential Question**

What does dividing by 5 mean?

**Unlock the Problem**

Kaley wants to buy a new cage for Coconut, her guinea pig. She has saved 35¢. If she saved a nickel each day, for how many days has she been saving?

• How much is a nickel worth?

Answer:

**One Way**

Count up by 5s.

- Begin at O.
- Count up by 5s until you reach 35.
- Count the number of times you count up.

You counted up by 5 seven times. 35 ÷ 5 = _7__

So, Kaley has been saving for _7__ days.

**Another Way**

Count back on a number line.

- Start at 35.
- Count back by 5s until you reach 0.

Complete the jumps on the number line. - Count the number of times you jumped back 5.

You jumped back by 5 _7__ times.

35 ÷ 5 = _7__

**Math Talk**

**Mathematical Processes**

What if Kaley saved 7¢ each day instead of a nickel? What would you do differently to find how many days she has

saved?

**Strategy for Dividing with 5**

You have learned how to use doubles to multiply. Now you will learn how to use doubles to divide by 5.

**Divide by 10, and then double to divide by 5.**

When the divisor is 5 and the dividend is even, you can use a 10s fact.

First, divide by 10.

After you divide, double the quotient.

**Answer:
**

**Share and Show**

**Math talk**

**Mathematical Processes**

Explain how counting up to solve a division problem is like counting back on a number line.

Question 1.

Count back on the number line to find 15 ÷ 5. ____

Use count up or count back on a number line to solve.

Answer:** 3
Explanation:
**

**Count back on a number line.**

**Start at 15.****Count back by 5s until you reach 0.****Complete the jumps on the number line.****Count the number of times you jumped back 3.**

Question 2.

10 ÷ 2 = ___

Answer: **5
Explanation:
**

**Count back on a number line.**

**Start at 10.****Count back by 2s until you reach 0.****Complete the jumps on the number line.****Count the number of times you jumped back 5.**

** **Question 3.

20 ÷ 5 = ___

Answer: **4
Explanation:
**

**Count back on a number line.**

**Start at 20.****Count back by 2s until you reach 0.****Complete the jumps on the number line.****Count the number of times you jumped back 4.**

**Find the quotient.**

Question 4.

50 ÷ 5 = ___

Answer:**10
Explanation:
There are three things in division. They are dividend, divisor, and quotient.
50 is the dividend.
5 is the divisor.
If we solve both 50 by 5 we get 10.
Therefore 10 is the quotient.**

Question 5.

5 ÷ 5 = ___

Answer: **1
Explanation:
There are three things in division. They are dividend, divisor, and quotient.
5 is the dividend.
5 is the divisor.
If we solve both 5 by 5 we get 1.
Therefore 1 is the quotient.
**

Question 6.

45 ÷ 5 = ___

Answer: **9
Explanation:
There are three things in division. They are dividend, divisor, and quotient.
45 is the dividend.
5 is the divisor.
If we solve both 45 by 5 we get 9.
Therefore 9 is the quotient.
**

**Algebra Complete the table.**

Question 7.

Answer:

**Explanation:
This table indicates multiplication.
10*1=10, 10*2=20, 10*3=30, 10*4=40, 10*5=50. {10th table up to 5 times}.
5*1=5, 5*2=10, 5*3=15, 5*4=20, 5*5=25. {5th table up to 5 times}.**

Question 8.

Answer:

**Explanation:
This table indicates the division (÷).
10÷10=1, 20÷10=2, 30÷10=3, 40÷10=4, 50÷10=5 { divide by 10}.
10÷5=2, 20÷5=4, 30÷5=6, 40÷5=8, 50÷5=10 { divide by 5}.**

**Problem Solving**

Question 9.

**Evaluate** Guinea pigs eat hay, pellets, and vegetables. If Wonder Hay comes in a 5-pound bag and costs $15, how much does 1 pound of hay cost?

Answer: The answer is **3
Explanation:
Given: Guinea pigs were used to eat hay, pellets, vegetables. If the hay comes in a 5-pound bag and it costs 15$. Then we need to find out the 1 pound of hay cost.
so, let’s take 1 pound of hay cost is ‘X’ .
we already know that a 5-pound bag cost is 15$.
We can write this as
Cross multiply, this we can write it as 5X=15$
X=15/5
X=3.
Therefore, 1 pound of hay cost is 3$.**

Question 10.

**H.O.T.** The pet store has 20 guinea pigs and plans to put a pair of guinea pigs in each cage. If the pet store has 8 cages, how many more cages will the pet store need?

Answer:** 2 cages.
Explanation:
The total number of guinea pigs that pet stores have=20.
They are planning to put the guinea pigs in a paired way, which means each pair has 2 pigs. Already pet store has 8 cages to put paired pigs. Now we need to find out the number of cages will pet stores need.
By diagrammatically,
By mathematically, 20/2=10 pairs, we already have 8 cages so, 10-8=2 cages.
Pet stores need 2 cages.**

**H.O.T. Pose a Problem**

Question 11.

Maddie went to a veterinary clinic. She saw the vet preparing some carrots for the guinea pigs.

Write a division problem that can be solved using the picture of carrots.

Answer**: 2 carrots
Explanation:
**

Question 12.

**Multi-Step** Write a similar problem by exchanging the number of equal groups and numbers in each group. Solve the problem. Describe what the quotient in your problem represents.

Answer:

**Explanation:
We already know there are 2 groups and 5 in each group so, we get 5*2=10 carrots are present totally. From the above diagram, the total is 10. But the question asked was about the quotient. so, total/amount in each group which means 10/5=2
**

**Daily Assessment Task**

**Fill in the bubble for the correct answer choice. You may use a division strategy to help you solve.**

Question 13.

**Analyze** Beth keeps her rock collection in boxes. She has 30 rocks. She puts 5 rocks in each box. How many boxes of rocks does Beth have?

(A) 5

(B) 6

(C) 7

(D) 8

Answer: Option **B** is correct

**Explanation:
Total number of rocks Beth keeps with her=30
Number of rocks she puts in each box=5
Now we need to find out the number of boxes is Beth is having=30÷5=6.
Therefore, 6 boxes are present.**

Question 14.

Hasib pays $50 for new T-shirts. Each T-shirt costs $5. How many T-shirts does Hasib buy?

(A) 5

(B) 4

(C) 2

(D) 10

Answer: Option **D** is correct.

**Explanation:
Total amount Hasib pays for new T-shirts=50$**

**cost of each T-shirt=5$**

**We need to find out the number of T-shirts did he buy=50/5=10.**

**Therefore, 10 T-shirts Hasib buys.**

Question 15.

**Multi-Step**Ana picks 25 apples. Pedro picks 20 apples. Ana and Pedro use the apples to make apple pies.

They put 5 apples in each pie. How many apple pies do they make?

(A) 4

(B) 5

(C) 9

(D) 8

Answer: Option

**C**is correct.

**Explanation:**

The number of apples Ana pick=25.

The number of apples Pedro pick=20.

Both are used their apples to make apple pies and they put 5 apples in each pie. Here we need to find out the number of apple pies they are done.

By simplifying this, total apples=25+20=45.

In each pie they put 5 apples, from this we can get the number of apple pies=45/5=9.

Therefore, 9 apple pies they make.

The number of apples Ana pick=25.

The number of apples Pedro pick=20.

Both are used their apples to make apple pies and they put 5 apples in each pie. Here we need to find out the number of apple pies they are done.

By simplifying this, total apples=25+20=45.

In each pie they put 5 apples, from this we can get the number of apple pies=45/5=9.

Therefore, 9 apple pies they make.

**Texas Test Prep**

Question 16.

Guinea pigs sleep about 45 hours every 5 days with their eyes open. About how many hours a day do guinea pigs sleep?

(A) about 5 hours

(B) about 40 hours

(C) about 9 hours

(D) about 50 hours

Answer: Option **C** is correct.

**Explanation:
The total number of hours guinea pigs sleep with their eyes open=45.
The number of days they sleep=5.
We need to find out the number of hours a day does guinea pigs sleep=45/5=9.
Therefore, they sleep 9 hours a day.**

### Texas Go Math Grade 3 Lesson 12.3 Homework and Practice Answer Key

**Use count up or count back on a number line to solve.**

Question 1.

30 ÷ 5 = ___

Answer: **6
Explanation:
**

**Count up by 5s.**

**Begin at O.****Count up by 5s until you reach 30.****Count the number of times you count up.**

You counted up by 5 six times. 30 ÷ 5 = _6_.

** **Question 2.

45 ÷ 5 = ___

Answer: **9
Explanation:
**

**Count up by 5s.**

**Begin at O.****Count up by 5s until you reach 45.****Count the number of times you count up.**

You counted up by 5 nine times. 45 ÷ 5 = _9_.

**Problem Solving**

Question 3.

A librarian has 35 books on a cart. He evenly separates the books on five shelves. How many books are on each shelf?

Answer:** 7
Explanation:
The number of books a librarian has on a cart=35.
The number of shelves he has separated for books=7.
The number of books on each shelf=35/5=7.
Therefore, 7 books on each shelf.**

Question 4.

There are 25 paint cans. If the art teacher puts five cans in each box, how many boxes does she need?

Answer:** 5
Explanation:
The number of paint cans=25.
The number of cans the art teacher puts in each box=5.
The number of boxes she needs to be kept=25/5=5.
Therefore, 5 boxes are needed.**

Question 5.

Marky picks some flowers. Write a division problem that can be solved using the picture of the flowers. Then solve the problem.

Answer: **5 flowers
Explanation:
**

**Texas Test Prep**

**Lesson Check**

**Fill in the bubble completely to show your answer.**

Question 6.

Dikembe has 25 toy boats. He puts ‘them in groups of 5. How many boats are in each group?

(A) 5

(B) 6

(C) 20

(D) 10

Answer: Option** A** is correct.

**Explanation:
The number of toy boats Dikembe has=25.
The number of groups he has put=5
We need to find out the number of boats in each group=25/5=5.
Therefore, 5 boats in each group.**

Question 7.

Jeri pays $30 for CDs. Each CD costs $5. How many CDs does Jeri buy?

(A) 5

(B) 6

(C) 25

(D) 15

Answer: Option **B** is correct.

**Explanation:
The number of CDs did Jeri pay=30$
Cost of each CD=5$
The number of CDs did Jeri buy=30/5=6.
Therefore, he bought 6 CDs.**

Question 8.

Damian has 20 crayons. There are 5 crayons in each box. How many boxes of crayons does Damian have?

(A) 5

(B) 4

(C) 15

(D) 10

Answer: Option **B** is correct.

**Explanation:
The number of crayons Damian has=20
The number of crayons in each box=5
The number of boxes does Damian have=20/5=4.
Therefore, he has 4 boxes.**

Question 9.

A group of 45 people go camping. Each tent sleeps 5 people. How many tents will the campers need?

(A) 7

(B) 8

(C) 9

(D) 50

Answer: Option **C** is correct.

**Explanation:
The number of people going camping=45
The number of people sleeping in each tent=5
The number of tents the campers needed=45/5=9.
Therefore, They need 9 tents. **

Question 10.

**Multi-Step** Maxine has 15 pennies and 25 nickels. She puts the coins into stacks of 5. How many stacks of coins does she make?

(A) 5

(B) 8

(C) 3

(D) 9

Answer: Option **B** is correct.

**Explanation:
The number of pennies and nickles Maxine has=12+25=40
The number of coins she puts in stacks=5
The number of stacks she made=40/5=8.
Therefore, she made 8 stacks. **

Question 11.

**Multi-Step** There are 17 boys and 13 girls in gym class. They are in 5 equal teams. how many students are on each team?

(A) 10

(B) 5

(C) 30

(D) 6

Answer: Option **D** is correct.

**Explanation:
The number of boys in gym class=17.
The number of girls in gym class=13.
The number of equal teams=5.
Both totally=17+13=30 students.
The number of students on each team=30/5=6
Therefore, there are 6 students in each team. **