3rd Grade Math "What Do You Know?" (Intro)

What is an array?

• I am not sure yet...

• It has rows and columns of items.

• It's a rainbow!

Do rows go side to side or up and down?

• Side to side

• Up and down

Do columns go up and down or side to side?

• Up and down

• Side to Side

How many rows are in this array?

• 2

• 4

• 3

• 5

How many columns are in this array?

• 3

• 6

• 5

• 4

What is 2X9?

• 17

• 20

• 9

• 18

What is the 9's trick we use when solving multiplication problems?

• Put your finger up to show the correct number.

• Clap your hands.

• If the question is 7x9, then I would put my seventh finger down and count how many total fingers I have up to find my answer.

Let's practice the 9's trick! What is 3X9?

• 27

• 29

• 30

• 36

Let's try one more! What is 5X9?

• 40

• 45

• 36

• 54

A factor X a factor= a p______.