3rd Grade-My Math-Multiplication Review

Multiply by 2, 5, or 10

100

Lisa bought 5 books at a bookstore. Each book was $2. How much did Lisa spend?

She spent $10

200

List the first 10 multiples of 2.

2, 4, 6, 8, 10, 12, 14, 16, 18, 20

300

Draw 4 groups of 2 and write a multiplication sentence to match.

* *        * *        * *        * *

4 x 2 = 8

400

Solve the following:  

10x1=

10x10=

10x100=

10x1=10

10x10=100

10x100=1,000

500

Draw 5 groups of 8 and write a multiplication sentence to match.

* * * * * * * *        * * * * * * * *                        

* * * * * * * *        * * * * * * * *

* * * * * * * *

5 x 8 = 40

Multiply by 3, 4, or 11

100

11 x 0 =

0

200

4 x 11 =

44

300

3 x 12 =

36

400

8 x 4 =

32

500

Use repeated addition to solve 9 x 11.

11 + 11 + 11 + 11 + 11 + 11 + 11 + 11 + 11 =

99

Multiply by 6, 7, 8, 9, or 12

100

6 x 3 =

18

200

Joey wanted to buy baseballs for each of his 6 friends. If each baseball was $6, how much money will Joey have to spend?

6 x 6 = 36

So, Joey will have to spend $36

300

Draw an array to match this equation and then solve:

4 x 12=

* * * * * * * * * * * *        4 rows of 12 

* * * * * * * * * * * *        4 x 12 = 48

* * * * * * * * * * * *

* * * * * * * * * * * *

400

Solve.

9 x 8 =

9 x 8 = 72

500

7 x 10 =

So, 70 x 10=

7 x 10 = 70

So, 70 x 10 = 700

Properties of Multiplication

100

Use the commutative property of multiplication to solve the following two equations:

9 x 3 =

3 x 9 =

Since 9 x 3 = 27,

         3 x 9 = 27

200

Use the associative property of multiplication to solve:

(5 x 2) x 8 =

 (5 x 2 ) x 8 =

        10 x 8 = 80

300

Use the associative property of multiplication to solve:

7 ( 6 x 2 ) =

7 x ( 6 x 2 ) =

7 x 12 = 84

400

Use the distributive property to solve:

6 x 15 =

Hint: Draw and separate the array.

* * * * * * * * * * * * * * *

* * * * * * * * * * * * * * *

* * * * * * * * * * * * * * *

* * * * * * * * * * * * * * *

* * * * * * * * * * * * * * *

* * * * * * * * * * * * * * *

6 x 10 = 60                 6 x 5 = 30

* * * * * * * * * *     * * * * *

* * * * * * * * * *     * * * * *

* * * * * * * * * *     * * * * *

* * * * * * * * * *     * * * * *

* * * * * * * * * *     * * * * *

* * * * * * * * * *     * * * * *

Put them back together:

Since 60 + 30 = 90,         6 x 15 = 90

500

Solve:

(4 x 3) x 9=

(4 x 3 ) x 9 =

      12 x 9 = 108

Word Problems

100

Mrs. Vail is making rice krispie treats. She needs 6 cups of rice krispies. If she wants to double the recipe, how many cups of rice krispies will she need?

6 x 2 = 12

So, Mrs. Vail will need 12 cups of rice krispies.

200

The dogs at the humane society all have 4 legs. If the worker counted 40 legs, how many dogs are there?

4 x ____ = 40

So, there are 10 dogs at the humane society.

300

Carrie was picking plums with two friends. If they each picked 11 plums, how many plums did the three kids pick all together?

3 x 11 = 33

So they picked 33 plums all together.

400

Donald is helping his teacher organize the new crayon boxes. He put 8 boxes in each row. If he made 9 rows, how many new crayon boxes did his teacher have?

9 rows, 8 in each row

9 x 8 = 72

So his teacher had 72 new boxes of crayons.

500

There are 3 3rd grade classes at Woodlands Elementary. There are 2 spiders in each class. Each spider has 8 legs. How many spider legs are there in all?

(3 x 2) x 8 =

       6 x 8 = 48

So there are 48 spider legs between all of the 3rd grade classrooms.