## Engage NY Eureka Math 3rd Grade Module 1 Lesson 9 Answer Key

Eureka Math Grade 3 Module 1 Answer Key

### Eureka Math Grade 3 Module 1 Lesson 9 Pattern Sheet Answer Key

multiply by 2 (1–5)

Answer:

Explanation:

Multiply by 2 (1–5) as shown above.

### Eureka Math Grade 3 Module 1 Lesson 9 Problem Set Answer Key

Question 1.

The team organizes soccer balls into 2 rows of 5.

The coach adds 3 rows of 5 soccer balls.

Complete the equations to describe the total array.

Explanation:

Given the team organizes soccer balls into 2 rows of 5 as

2 × 5 = 10 and the coach adds 3 rows of 5 soccer balls as

3 × 5 = 15, Completed the equations to described the

total array as 5 × 5 = (2 + 3) × 5 = (2 × 5) + (3 × 5) =

10 + 15 = 25 or 5 × 5 = 25.

Question 2.

7 × 2 = __14___

7 × 2 = 14,

Explanation:

Given 7 × 2, we wrote 7 × 2 as (5 + 2) × 2 =

(5 × 2) + ( 2 × 2) = 10 + 4 = 14 or

7 × 2 = 14.

Question 3.

9 × 2 = __18___

9 × 2 = 18,

Explanation:

Given 9 × 2 we wrote 9 × 2 as

(10 – 1) × 2 = (10 × 2) – (1 × 2) =

20 – 2 = 18 or 9 × 2 = 18.

Question 4.

Matthew organizes his baseball cards in 4 rows of 3.

a. Draw an array that represents Matthew’s cards using an x to show each card.

b. Solve the equation to find Matthew’s total number of cards.

4 × 3 = __12__,

a.

Explanation:

Given Matthew organizes his baseball cards in 4 rows of 3,

So array shown as 4 × 3,

Drawn an array that represents Matthew’s cards using an x to show each card as shown above.

b. Total number of Matthew’s cards are 12,

Explanation:

Solved the equation to find Matthew’s total number of cards as 4 × 3 = 12.

Question 5.

Matthew adds 2 more rows. Use circles to show his new cards on the array in Problem 4(a).

a. Write and solve a multiplication equation to represent the circles you added to the array.

___2___ × 3 = __6____

Explanation:

Given Matthew adds 2 more rows.

Used circles to show his new cards on the array in

Problem 4(a) as shown above.

b. Add the totals from the equations in Problems 4(b) and 5(a) to find Matthew’s total cards.

__12____ + ___6___ = 18

Explanation:

Added the totals from the equations in Problems 4(b) and 5(a) to find Matthew’s total cards as

(4 × 3) + (2 × 3) = 12 + 6 = 18.

c. Write the multiplication equation that shows Matthew’s total number of cards.

___6___ × ___3___ = 18,

The multiplication equation to show total number of cards is 6 × 3 = 18,

Explanation:

The multiplication equation that shows Matthew’s total number of cards is 6 X 3 = (4 X 3) + (2 X 3) =

12 + 6 = 18 or 6 × 3 = 18.

### Eureka Math Grade 3 Module 1 Lesson 9 Exit Ticket Answer Key

Question 1.

Mrs. Stern roasts cloves of garlic. She places 10 rows of

two cloves on a baking sheet. Write an equation to describe

the number of cloves Mrs. Stern bakes.

___10____ × ___2____ = __20____ cloves

Answer:

The number of cloves Mrs. Stern bakes is 20 cloves,

Explanation:

Given Mrs. Stern roasts cloves of garlic. She places 10 rows of two cloves on a baking sheet. The equation to describe the number of cloves Mrs. Stern bakes is 10 × 2 = 20 cloves.

Question 2.

When the garlic is roasted, Mrs. Stern uses some for a recipe.

There are 2 rows of two garlic cloves left on the pan.

a. Complete the equation below to show how many garlic cloves Mrs. Stern uses.

____10____ twos – ____2____ twos = ____8___twos,

10 twos – 2 twos = 8 twos,

Explanation:

Completed the equation below to show how many garlic cloves Mrs. Stern uses as 10 twos – 2 twos = 8 twos.

b. 20 – ________ = 16

20 – 4 = 16,

Explanation:

Subtracted 4 from 20 we get 16 as 20 – 4 =16 cloves.

c. Write an equation to describe the number of garlic cloves

Mrs. Stern uses. ___8____ × 2 = ___16_____,

The number of garlic cloves Mrs. Stern uses are 16 cloves,

Explanation:

Given Mrs. Stern roasts cloves of garlic,

She places 10 rows of two cloves on a baking sheet and

Mrs. Stern uses some for a recipe there are 2 rows of two garlic cloves left on the pan, 10 x 2 = 20 cloves and left are

2 × 2 = 4 cloves, Means used cloves are ( 10 × 2) – (2 × 2) =

20 – 4 = 16 cloves or (10 – 2) × 2 = 8 × 2= 16 cloves.

Therefore, the equation for number of garlic cloves Mrs. Stern uses are 8 × 2 = 16 cloves.

### Eureka Math Grade 3 Module 1 Lesson 9 Homework Answer Key

Question 1.

Dan organizes his stickers into 3 rows of four.

Irene adds 2 more rows of stickers. Complete the equations to describe the total number of stickers in the array.

a. (4 + 4 + 4) + (4 + 4) = __12 + 8 = ____20_____

b. 3 fours + ___2___ fours = _____5______ fours

c. ___5_____ × 4 = ____20____

a. (4 + 4 + 4) + (4 + 4) = 12 + 8 = 20,

b. 3 fours + 2 fours = 5 fours,

c. 5 X 4 = 20,

Explanation:

Given Dan organizes his stickers into 3 rows of four.

Irene adds 2 more rows of stickers.

Completed the equations to describe the total number of stickers in the array as 5 X 5 =

(3 × 5) + (2 × 5) = 15 + 10 = 25 or 5 × 5 = 25,

a. We wrote 5 × 5 as (4 + 4 + 4) + (4 + 4) = 12 + 8 = 20,

b. We wrote 5 × 5 as 3 fours + 2 fours = 5 fours,

c. We wrote 5 × 4 as 20, 5 × 4 = 20.

Question 2.

7 × 2 = __14____

7 × 2 = 14,

Explanation:

Given 7 × 2 we wrote 7 × 2 as (6 + 1) × 2 =

(6 × 2) + (1 × 2) = 12 + 2 = 14 or 7 × 2 = 14.

Question 3.

9 × 3 = __27___

9 × 3 = 27,

Explanation:

Given 9 × 3 we wrote 9 × 3 as (10 – 1) × 3 =

(10 × 3) – (1 × 3) = 30 – 3 = 27 or 9 x 2 = 27.

Question 4.

Franklin collects stickers. He organizes his stickers in 5 rows of four.

a. Draw an array to represent Franklin’s stickers.

Use an x to show each sticker.

b. Solve the equation to find Franklin’s total number of stickers. 5 × 4 = ___20___

a.

b. Franklin’s total number of stickers are 20.

Explanation:

Given Franklin collects stickers. He organizes his stickers in 5 rows of four.

a. Drawn an array to represent Franklin’s stickers,

Used an x to show each sticker as shown above.

b. Solved the equation to find Franklin’s total number of stickers as 5 × 4 = 20.

Question 5.

Franklin adds 2 more rows. Use circles to show his new stickers

on the array in Problem 4(a).

a. Write and solve an equation to represent the circles you added to the array.

___2___ × 4 = ___8___

Explanation:

Given Franklin adds 2 more rows. Used circles to show his new stickers on the array in Problem 4(a).

a. Wrote and solved an equation to represent the circles I added to the array as 2 × 4 = 8.

b. Complete the equation to show how you add the totals of 2 multiplication facts to find Franklin’s total number of stickers. __20____ + ___8___ = 28,

Equation of totals of 2 multiplication facts to find Franklin’s total number of stickers are 20 + 8 = 28,

Explanation:

Completed the equation to show how I added the totals of 2 multiplication facts to find Franklin’s total number of stickers as (5 × 4) + (2 × 4) = 20 + 8 = 28.

c. Complete the unknown to show Franklin’s total number of stickers.

__5___ × 4 = 20,

The unknown Franklin’s total number of stickers are 20,

Explanation:

To show unknown Franklin’s total number of stickers as given Franklin collects stickers. He organizes his stickers in 5 rows of four, So, Franklin’s total number of stickers are 5 × 4 = 20.