Multiplication Review 3rd Grade

FACTORS & Multiples

100

What are the factors in the multiplication problem show below? 5 x 9 = 45

5 and 9 are factors. (The numbers that are being multiplied together are the factors.)

200

List the first 5 multiples of the number 4.

The first 5 multiples are 4, 8, 12, 16, and 20.

300

What is the missing factor in this problem? 3 x ___ = 15

The missing factor is 5. 3 x 5 = 15

400

Is the number 25 a multiple of 2? How do you know?

NO! Multiples of 2 are all even numbers. ex: 2, 4, 6, 8, 10, 12....

500

What is the missing factor? (2 x 3) x 4 = 2 x (__ x 4)

The missing factor is 3.

ARRAYS & EQUAL GROUPS

100

What multiplication fact matches the array shown below? 

x x x x 

x x x x 

x x x x 

 3 x 4

200

^{What multiplication fact is represented by the equal groups shown below?} 

^{X X X X X X}

^{X X X X X X}

^{X X X X X X}

^{X X X X X X}

4 X 6

300

Michael has 3 dogs. To show how many paws they have in all, what will your equal groups look like? How many groups? How many in each group?

You can draw 3 groups of 4 or 4 groups of 3.

400

^{Which array shows 2 x 7 = 14} 

        ^{A.)                                      B.)}

             ^{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 X X X}

Choice A shows an array to represent 2 x 7 = 14. (Choice B has 14 x's but they are not in even rows and columns.)

500

^{Which array matches the equal groups drawn here?}

 ^{x x x x x x x x x x x x x x x x x x x x} 

^{A.) x x x x x                                 B.) 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 x x                                      X X X X}

                                                        ^{X X X X}

Both A AND B represent the equal groups. 4 rows of 5 AND 5 rows of 4 are both acceptable ways to draw this array.

REPEATED ADDITION/BASIC FACTS

100

How can you solve 8 x 6 with repeated addition?

8 + 8 + 8 + 8 + 8 + 8= 48 or 6 + 6 + 6 + 6 + 6 + 6 + 6 + 6 = 48

200

What multiplication problem will help you solve this repeated addition problem? 2 + 2 + 2 + 2 + 2 + 2

2 x 5 = 10

300

What is 5 x 6?

30

400

What is 3 x 8?

24

500

What is 9 x 4?

36

PROPERTIES

100

What property is shown below? 7 x 3 = 3 x 7

Commutative Property of Multiplication

200

What property is shown below? 9 x 1 = 9

Identity Property of Multiplication

300

What property is shown below? (6 x 2) x 3 = 6 x (2 x 3)

Associative Property of Multiplication

400

What property is shown below? 4 x 9 = (4 x 4) + (4 x 5)

Distributive Property of Multiplication

500

What is missing? 6 x 8= (6 x 3) + (6 x ___)

The missing factor is 5.

WORD PROBLEMS

100

There are 4 bags of oranges on the table. Each bag has 2 oranges in it? How many oranges are there altogether?

There are 8 oranges altogether.

200

Sarah has 5 friends. She gives each friend 3 stickers. How many stickers is she giving to her friends in all?

She is giving out 15 stickers.

300

Four monkeys ate some bananas for a snack. Each monkey had six bananas. What is the total number of bananas that they ate?

They had 24 bananas total.

400

There are four groups of desks in our classroom. Five desks are at each group. How many students can sit at a desk in our classroom?

There are enough desks for 20 students.

500

CHALLENGE!!!!! There are 7 third grade classes. Each class has about 20 students in it. Approximately how many students are there in third grade at Welch Elementary?

There are about 140 students.