All the solutions provided in **McGraw Hill Math Grade 2 Answer Key PDF Chapter 2 Lesson 5 Repeated Addition with Arrays** will give you a clear idea of the concepts.

## McGraw-Hill My Math Grade 2 Answer Key Chapter 2 Lesson 5 Repeated Addition with Arrays

**Explore and Explain**

**Teacher Directions:** Jamar and 3 of his friends each collect 2 rocks. How many rocks do they hove in oil? Use connecting cubes to show equal groups of rocks. Color in the grid to show your work. Write a number sentence to show the total.

Explanation:

**See and Show**

In an array, objects are shown in rows and columns.

**Describe each array using a number sentence.**

Question 2.

____ rows of _____ turtles

Answer:

Explanation:

sum = number of rows x number of columns

3 x 3 = 9

There are 3 rows of turtles

In each row there are 3 turtles

Question 3.

____ + ___ = ____

____ rows of ____ cacti

Answer:

Explanation:

sum = number of rows x number of columns

2 x 4 = 8

2 rows of 4 cacti so, 8 in all

Question 3.

Shade the grid to show 4 rows of 2. Write a number sentence to describe it.

Answer:

Explanation:

sum = number of rows x number of columns

4 x 2 = 8

Number of boxes colored are 8

**Talk Math** How can arrays help you add?

**On My Own**

**Describe the array using a number sentence.**

Question 4.

Answer:

Explanation:

sum = number of rows x number of columns

There are 3 rows of lizards

in each row there are 5

5 x 3 = 15

**Shade each grid to show the array. Write a number sentence to describe it.**

Question 5.

Show 4 rows of 3.

Answer:

Explanation:

sum = number of rows x number of columns

4 x 3 =12

Number of boxes colored are 12

Question 6.

Show 4 rows of 1.

Answer:

Explanation:

sum = number of rows x number of columns

1 x 4 = 4

Number of boxes colored are 4

Question 7.

Show 2 rows of 5.

Answer:

Explanation:

sum = number of rows x number of columns

2 x 5 = 10

Number of boxes colored are 10

Question 8.

Show 3 rows of 4.

Answer:

Explanation:

sum = number of rows x number of columns

3 x 4 = 12

Number of boxes colored are 12

**Problem Solving**

**Use an array to solve.**

Question 9.

Kathy puts 5 chairs in one row. She puts the same number of chairs in three more rows. How many chairs are there in all?

_______ chairs

Answer:

Explanation:

sum = number of rows x number of columns

4 x 5 = 20

Number of boxes colored are 20

Question 10.

Three hills each have 4 wind turbines. How many wind turbines are there mall?

_______ wind turbines

Answer:

Explanation:

sum = number of rows x number of columns

3 x 4 = 12

Number of boxes colored are 12

**Write Math** Describe how this array shows the number sentence 2 + 2 + 2= 6.

### McGraw Hill My Math Grade 2 Chapter 2 Lesson 5 My Homework Answer Key

**Describe each array using a number sentence.**

Question 1.

___ rows of ___ mice

Answer:

Explanation:

sum = number of rows x number of columns

4 x 3 = 12

there are 3 rows of mice in each row there are 4

Question 2.

___ rows of ___ owls

Answer:

Explanation:

sum = number of rows x number of columns

5 x 2 = 10

There are 2 rows of owls in each row there are 5 owls.

Question 3.

Show 3 rows of 5.

________

Answer:

Explanation:

sum = number of rows x number of columns

3 x 5 = 15

Number of boxes colored are 15

Question 4.

Show 3 rows of 2.

________

Answer:

Explanation:

sum = number of rows x number of columns

2 x 3 = 6

Number of boxes colored are 6

**Describe each array using a number sentence.**

Question 5.

Show 3 rows of 5.

Answer:

Explanation:

sum = number of rows x number of columns

3 x 5 = 15

Number of boxes colored are 15

Question 6.

Show 4 rows of 2.

Answer:

Explanation:

sum = number of rows x number of columns

4 x 2 = 8

Number of boxes colored are 8

Question 7.

Show 2 rows of 4.

Answer:

Explanation:

sum = number of rows x number of columns

2 x 4 = 8

Number of boxes colored are 8

Question 8.

There are 4 legs on 1 camel. How many legs are on 5 camels?

______ legs in all

Answer:

5 x 4 = 20 legs in all

Explanation:

sum = number of rows x number of columns

1 camel has 4 legs

there are 5 camels

4 + 4 + 4 + 4 + 4 = 20

4 x 5 = 20

**Vocabulary Check**

Question 9.

Draw an array of 2 rows of 3.

Answer:

Explanation:

2 x 3 = 6

Number of boxes colored are 6

**Math at Home** Have your child think of things around them that are in an array.

Ex: eggs in a carton, days on the calendar, etc.