Multiply with Equal Groups, Repeated Addition, and Arrays

Multiply: Equal Groups Using Repeated Addition and Arrays

Equal Groups

There are the same number of objects in each group.

Tips

• Rows before Columns when you write an equation to match the array

• Each group or row has an equal amount

• Check your product/answer using repeated addition.

• Commutative Property: If the two factors are reversed, you still get the same product. 2 x 3 = 3 x 2

Let's Practice!

Multiple Choice

Which number sentence represents this array correctly?

• 5 x 2 = 10

• 2 x 5 = 10

Do 10 jump squats!

Remember... rows before columns.

Multiple Choice

Which number sentence represents this array correctly?

• 3 x 6 = 18

• 6 x 3 = 18

Do 18 high knees!

Remember... an array model should have equal groups.

Multiple Choice

Which number sentence represents this array correctly?

• 4 x 5 = 20

• 5 x 4 = 20

Do 20 arm circles!

10 going forward and 10 going backward.

Remember... multiplication is repeated addition.

Multiple Choice

6 rows of 4 cars in each row equals...

• 10

• 12

• 24

• 30

Multiple Choice

What is the repeated addition sentence for this array?

• 6 + 6 + 6 + 6

• 4 + 4 + 4 + 4 + 4 + 4

Multiple Choice

3 rows of 3 sharks in each row equals...

• 0

• 6

• 9

• 3

Multiple Choice

What is the repeated addition sentence for this array?

• 3 + 3 + 3

• 3 + 3

• 3 x 3

Do 9 standing marches!

Multiple Choice

What's the equation for this array?

• 5 x 4 = _

• 5 x 5 = _

• 4 x 5 = _

• 4 x 4 = _

Multiple Choice

What is the repeated addition sentence for this array?

• 4 + 4 + 4 + 4 + 4

• 5 + 5 + 5 + 5

• 4 + 4 + 4 + 4

• 5 + 5 + 5 + 5 + 5

Multiple Choice

What's the product for this array?

• 16

• 20

• 25

• 9

Do 20 jumping jacks!

Poll

I am comfortable using arrays, equal groups, and repeated addition to solve multiplication problems.

• Yes.

• No.