Multiplication and Arrays

Word Problems

100

 

Cam places her Pokemon cards in 5 rows of 4. Then, she gives away six cards to her best friend. How many Pokemon cards does she have now?

 14

200

 

Jay earns 2 Tiger Bucks on each of 5 days this week. He wants to have 25 Tiger Bucks to purchase a toy in the Tiger Store. How many Tiger Bucks does he still need to earn?

15

300

Mal and Evie have the same number of apples. Mal uses all of her apples to fill 3 baskets with 10 apples in each basket. Evie fills up 10 baskets with an equal amount of apples in each. Which equation shows how to find the number of apples, a, that Evie has placed in each basket?

10 x s = 30

400

Audrey bought 4 packs of poster pages for a project. Each pack comes with 3 poster pages inside. She also bought another 5 poster pages that did not come in packs. Which equation tells how many poster pages she bought in all?

4 x 3 + 5 = p

P=17

500

Greta put 6 coins into 3 of each stacks. She wrote two equations to find the total amount of coins she has.

What are the 2 related multiplication sentences to solve for the product? 

6x3=18, and 3x6=18

Multiplication

100

Write the multiplication expression as repeated addition, and solve. 4X5=

5+5+5+5=20 or 4+4+4+4+4=20

200

Convert the repeated addition into a multiplication sentence, and solve. 4+4+4=

4X3=12

300

Convert the repeated addition into a multiplication sentence, and solve. 5+5+5+5+5=

5X5=25

400

Convert the repeated addition into a multiplication sentence, and solve. 6+6+6+6+6+6+6=

6X7=42

500

Convert the repeated addition into a multiplication sentence, and solve. 7+7+7+7+7=

7X5=35

Array to Sentence

100

What multiplication sentence does this array represent?
 X X X
X X X
X X X

3X3=9

200

What multiplication sentence does this array represent?
X X X X X
X X X X X
X X X X X
X X X X X
X X X X X

5x5=25

300

Draw the array, convert the array to a multiplication sentence, and solve. 3 rows and 6 objects in a row.

3X6=18

400

Draw the array, convert the array to a multiplication sentence, and solve. 6 rows and 5 objects in a row.

6X5=30

500

Draw the array, convert the array to a multiplication sentence, and solve. 4 rows and 7 objects in a row.

4X7=

Sentence to Array

100

Convert the multiplication sentence to an array, and solve. 2X4=

2 rows of 4=8

200

Convert the multiplication sentence to an array, and solve. 3X5=

3 rows of 5 =15

300

Convert the multiplication sentence to an array, and solve. 4X6=

4 rows of 6 =24

400

Convert the multiplication sentence to an array, and solve. 6X5=

6 rows of 5 =30

500

Convert the multiplication sentence to an array, and solve. 7X7=

7 rows of 7 =49

Definitions

100

What is the answer to a multiplication equation?

product

200

What is multiplication?

Repeated addition.

300

What is a factor?

One of the numbers being multiplied together in a multiplication problem.

400

What is the commutative property of multiplication?

The factors can be in any order, and you will always find the same product.

500

Give me an example of the Identity Property of multiplication. 

Answers may vary.