Refer to our Texas Go Math Grade 3 Answer Key Pdf to score good marks in the exams. Test yourself by practicing the problems from Texas Go Math Grade 3 Lesson 10.5 Answer Key Model with Arrays.

## Texas Go Math Grade 3 Lesson 10.5 Answer Key Model with Arrays

**Essential Question**

How can you use arrays to solve division problems?

Answer:

An arrangement of objects, pictures, or numbers in columns and rows is called an array, and division of the objects or pictures in equal group solve the problem.

**Investigate**

Materials square tiles

You can use arrays to model division and find equal groups.

A. Count out 30 tiles. Make an array to find how many rows of 5 are in 30.

Answer:

6 rows

Explanation:

30 tiles are grouped 5 of 6 rows

30÷5 = 6

B. Make a row of 5 tiles.

Answer:

Explanation:

The array contains 30 tiles which are grouped 5 of 6 rows.

30÷5 = 6

C. Continue to make as many rows of 5 tiles as you can.

How many rows of 5 did you make? ____

Answer:

6 rows

Explanation:

30÷5 = 6

So, we can make 6 rows.

**Make Connections**

You can write a division equation to show how many rows of 5 are in 30. Show the array you made in Investigate by completing the drawing below.

30 ÷ 5 = ___

There are ___ rows of 5 tiles in 30.

So, 30 ÷ 5 = _____

Answer:

completing the drawing:

30 ÷ 5 = 6

There are 6 rows of 5 tiles in 30.

So, 30 ÷ 5 = 6

**Math Idea**

You can divide to find the number of equal rows or to find the number in each row.

n x n

1 x 1

2 x 2

3 x 3

**Share and Show**

**Use square tiles to make an array. Solve.**

Question 1.

How many rows of 3 are in 18?

Answer:

6 rows

Explanation:

Array has 18 tiles arranged in rows.

Each row has 3 tiles.

Total rows in array

18 ÷ 3 = 6

Question 2.

How many rows of 6 are in 12?

Answer:

2 rows

Explanation:

Array has 12 tiles arranged in rows.

Each row has 6 tiles.

Total rows in array

18 ÷ 6 = 2

Question 3.

How many rows of 7 are in 21?

Answer:

3 rows

Explanation:

Array has 21 tiles arranged in rows.

Each row has 7 tiles.

Total rows in array

21 ÷ 7 = 3

Question 4.

How many rows of 8 are in 32?

Answer:

4 rows

Explanation:

Array has 32 tiles arranged in rows.

Each row has 8 tiles.

Total rows in array

32 ÷ 8 = 4

**Make an array. Then write a division equation.**

Question 5.

25 tiles in 5 rows

Answer:

5 tiles in a row

25÷5 = 5

Explanation:

Array has 25 tiles arranged in rows.

Total 5 rows in array

Each row has 25 ÷ 5 = 5

Question 6.

14 tiles in 2 rows

Answer:

7 tiles in a row

14÷2 = 7

Explanation:

Array has 14 tiles arranged in rows.

Each row has 7 tiles

Total rows in array 14 ÷ 2 = 7

Question 7.

28 tiles in 4 rows

Answer:

7 tiles in a row

28÷4 = 7

Explanation:

Array has 28 tiles arranged in rows.

Total 4 rows in array

Each row has 28 ÷ 7 = 7

Question 8.

27 tiles in 9 rows

Answer:

3 tiles in a row

27÷9=3

Explanation:

Array has 27 tiles arranged in rows.

Total 9 rows in array

Each row has 27 ÷ 9 = 3

Question 9.

How many rows of 3 are in 15?

Answer:

5 rows

15 ÷ 5 = 3

Explanation:

Array has 15 tiles arranged in rows.

Each row has 3 tiles

Total rows in array 27 ÷ 9 = 3

Question 10.

How many rows of 8 are in 24?

Answer:

3 rows

24 ÷ 8 = 3

Explanation:

Array has 24 tiles arranged in rows.

Each row has 8 tiles

Total rows in array 24 ÷ 8 = 3

**Math Talk**

**Mathematical Processes**

Explain when you Count the number of rows to find the answer and when you count the number of tiles in each row to find the answer.

Answer:

To find the number of tiles in a row, total tiles ÷ number of row is calculated.

To find the number of rows, total tiles ÷ number of tiles in row is calculated.

Question 11.

**Write Math** Show two ways you could make an array with tiles for 18 ÷ 6. Shade squares on the grid to record the arrays.

Answer:

18 ÷ 6 = 3

6 rows of 3 tiles

or

3 rows of 6 tiles

Explanation:

count the number of tiles on the grid and shade as,

6 rows of 3 tiles

3 rows of 6 tiles

**Problem Solving**

Question 12.

Thomas has 28 tomato seedlings to plant in his garden. He wants to plant 7 seedlings in each row. How many rows of tomato seedlings will Thomas plant?

Answer:

4 rows of tomato seedlings.

Explanation:

Thomas has 28 tomato seedlings to plant in his garden.

He wants to plant 7 seedlings in each row.

Total rows of tomato seedlings Thomas plant

28 ÷ 7 = 4

Question 13.

**H.O.T. Use Math Language** Tell how to use an array to find how many rows of 8 are in 40.

Answer:

An array is an orderly arrangement (often in rows, columns or a matrix) that is most commonly used as a visual tool for demonstrating multiplication and division .

40 ÷ 8 = 5

Explanation:

An array refers to a set of numbers or objects that will follow a specific pattern.

40 ÷ 8 = 5

Question 14.

Faith plants 36 flowers in 6 equal rows. How many flowers are in each row?

Answer:

6 flowers in each row.

Explanation:

Faith plants 36 flowers in 6 equal rows.

Total flowers in each row

36 ÷ 6 = 6

Question 15.

**H.O.T. Multi-Step** There were 20 plants sold at a store on Saturday and 30 plants sold at the store on Sunday. Customers bought 5 plants each. How many customers in all bought the plants?

Answer:

10 customers bought the plants.

Explanation:

There were 20 plants sold at a store on Saturday and

30 plants sold at the store on Sunday.

Total plants sold on both days 20 + 30 = 50

Customers bought 5 plants each.

Number of customers bought the plants

50 ÷ 5 =10

Question 16.

**H.O.T. Multi-Step** Lionel made an array with 24 tiles. The number of rows is 5 more than the number of tiles in each row. How many rows are in Lionel’s array?

Answer:

3 rows

Explanation:

Lionel made an array with 24 tiles.

The number of rows is 5 more than the number of tiles in each row.

Number of rows in Lionel’s array is 3

**Daily Assessment Task**

**Fill in the bubble for the correct answer choice.**

**You may use objects or models to solve.**

Question 17.

**Multi-Step** Mrs. Weston is baking 24 oatmeal raisin cookies. There will be 4 rows of cookies on the cookie tray. She has already put one row of cookies on the tray. How many more cookies does she have left to put on the tray?

(A) 6

(B) 20

(C) 18

(D) 3

Answer:

Mrs. Weston is baking 24 oatmeal raisin cookies.

There will be 4 rows of cookies on the cookie tray.

24 ÷ 4 = 6

She has already put one row of cookies on the tray.

4 – 1 = 3 rows left

3 x 6 = 18

18 more cookies she have left to put on the tray.

Question 18.

**Representations** Which division equation is shown by the array?

(A) 24 ÷ 3 = 8

(B) 24 ÷ 4 = 6

(C) 24 ÷ 2 = 12

(D) 21 ÷ 3 = 7

Answer:

Option (A)

Explanation:

The array contains 24 tiles,

arranged as 3 rows of 8 tiles.

Question 19.

**Multi-Step** Hajune finds 9 black rocks one week and 9 black rocks the next week. He wants to keep the rocks in a box with 3 rows. How many black rocks can he put in each row?

(A) 18

(B) 6

(C) 12

(D) 3

Answer:

6 black rocks in a box.

Explanation:

Hajune finds 9 black rocks one week and 9 black rocks the next week.

Total black rocks 9 + 9 = 18

He wants to keep the rocks in a box with 3 rows.

Total black rocks he put in each row

18 ÷ 3 = 6

**Texas Test Prep**

Question 20.

Sally makes an array using 36 coins. If she puts 4 coins in each row, how many rows does she make?

(A) 40

(B) 32

(C) 8

(D) 9

Answer:

Option(D)

Explanation:

Sally makes an array using 36 coins.

If she puts 4 coins in each row,

Total rows she make

36 ÷ 4 = 9

### Texas Go Math Grade 3 Lesson 10.5 Homework and Practice Answer Key

**Make an array. Then write a division equation.**

Question 1.

21 tiles in 3 rows

Answer:

7 tiles in each row

21 ÷ 3 = 7

Explanation:

Array has 21 tiles arranged in 3 rows.

Each row has 27 ÷ 9 = 3 tiles

Question 2.

36 tiles in 6 rows

Answer:

6 tiles in each row

36 ÷ 6 = 6

Explanation:

Array has 36 tiles arranged in 6 rows.

Each row has 36 ÷ 6 = 6 tiles

Question 3.

16 tiles in 8 rows

Answer:

2 tiles in each row

16 ÷ 8 = 2

Explanation:

Array has 16 tiles arranged in 8 rows.

Each row has 16 ÷ 8 = 2 tiles

Question 4.

18 tiles in 3 rows

Answer:

6 tiles in each row

18 ÷ 3 = 6

Explanation:

Array has 18 tiles arranged in 3 rows.

Each row has 18 ÷ 3 = 6 tiles

Question 5.

How many rows of 4 are in 32?

Answer:

8 tiles in each row

32 ÷ 4 = 8

Explanation:

Array has 21 tiles arranged.

Each row has 4 tiles

number of rows 27 ÷ 9 = 3

Question 6.

How many rows of 4 are in 16?

Answer:

4 tiles in each row

16 ÷ 4 = 4

Explanation:

Array has 21 tiles arranged.

Each row has 4 tiles

number of rows 27 ÷ 9 = 3

**Problem Solving**

Question 7.

Hannah has a collection of 27 seashells. She wants to put 9 shells on each shelf. How many shelves does Hannah need?

Answer:

3 shelves

27 ÷ 9 = 3

Explanation:

Hannah has a collection of 27 seashells.

She wants to put 9 shells on each shelf.

Number of shelves Hannah need

27 ÷ 9 = 3

Question 8.

Dexter buys 18 fish. He wants to put an equal number of fish into 3 fishbowls. How many fish will he put in each fishbowl?

Answer:

6 fishes in each bowl.

Explanation:

Dexter buys 18 fish.

He wants to put an equal number of fish into 3 fishbowls.

Number of fish he put in each fishbowl

18 ÷ 3 = 6

Question 9.

Quentin is making a tile design with 35 tiles. He wants to put the tiles in rows. How can he set up the tiles so there are an equal number of tiles in each row?

Answer:

35÷7 =5 or

35÷5 =7

Explanation:

Quentin is making a tile design with 35 tiles.

He wants to put the tiles in rows.

He can set up the tiles in 2 ways, an equal number of tiles in each row

35÷7 =5 or 35÷5 =7

**Texas Test Prep**

**Lesson Check**

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

Question 10.

Marla makes this array.

What division equation can she write?

(A) 14 ÷ 3 = 7

(B) 14 ÷ 2 = 7

(C) 2 × 7 = 14

(D) 7 + 7 = 14

Answer:

Option(B)

Explanation:

Marla makes array of 14 tiles, arranged in 2 equal rows.

Number of tiles in each row

14 ÷ 2 = 7

Question 11.

Claude makes this array.

What division equation can he write?

(A) 24 ÷ 4 = 6

(B) 24 ÷ 3 = 8

(C) 4 × 6 = 24

(D) 6 × 4 = 20

Answer:

Option(A)

Explanation:

Claude makes array of 24 tiles.

Each row contains 4 tiles.

Total tiles arranged in equal rows

24 ÷ 4 = 6

Question 12.

Sondra runs for 32 minutes. If she runs 4 miles, how many minutes does it take her to run one mile?

(A) 6 minutes

(B) 7 minutes

(C) 8 minutes

(D) 28 minutes

Answer:

Option(C)

Explanation:

Sondra runs for 32 minutes.

If she runs 4 miles,

Total minutes it take her to run one mile

32 ÷ 4 = 8

Question 13.

There are 25 students on the playground. The students are in teams of 5. How many teams are on the playground?

(A) 6

(B) 5

(C) 4

(D) 7

Answer:

Option(B)

Explanation:

There are 25 students on the playground.

The students are in teams of 5.

Total teams on the playground

25 ÷ 5 = 5

Question 14.

**Multi-Step** Jennifer collects 9 animal cards and 21 nature cards. She wants to arrange them on a bulletin board in 6 rows. How many cards will be in each row?

(A) 5

(B) 2

(C) 3

(D) 7

Answer:

Option(A)

Explanation:

Jennifer collects 9 animal cards and 21 nature cards.

9 + 21 = 30

She wants to arrange them on a bulletin board in 6 rows.

Number of cards in each row

30 ÷ 6 = 5

Question 15.

**Multi-Step** Zach is planting a garden of 27 tomato plants. He puts the plants into rows of 9. If he has already planted one row, how many more rows does he need to plant?

(A) 3

(B) 2

(C) 18

(D) 4

Answer:

Explanation:

Option (B)

Zach is planting a garden of 27 tomato plants.

He puts the plants into rows of 9.

27 ÷ 9 = 3

If he has already planted one row, 3 – 1 = 2

2 more rows he need to plant