arrays, multiplication, division, oh my

Arrays, Multiplication, Division, Oh My!

Mrs. Elliott

What is an array?

• Why do we use arrays? • How do you use arrays?

What are all the possible arrays for 12?

What is the equation for this array?

What is the label or equation for this array?

What is multiplication?

• Why do we use it? • How do you use it?

What are these multiplication facts?

• 4 x 9 = _____• 3 x 3 = _____• 12 x 5 = _____• 6 x 6 = ____• 3 x 7 = ______

How can I multiply bigger numbers?

13 x 6

Multiply

• Up and…• To the LEFT, LEFT , LEFT

Give these a try!

25x5

37X 3

Two more!

48x7

59X 6

What is division?

• Why do we use it? • How do we use it?

Let me tell you about some frogs!

Mrs. Elliott has frogs everywhere on her porch. She counts 18 frogs one night. If she wanted to put them in 3 buckets to take them out to the field, how many frogs would go in each bucket. Ribbit?

6 frogs in a bucket

Pass out the candy!

• Mrs. Elliott bought a bag of candy. It had 43 pieces. She needs to divide it among the girls in her Sunday School class. She has 14 girls in her class. How many pieces will each girl get? Will there be some left over?

43 pieces and 14 girls

• Let’s draw it!

Division problems

• 25 divided by 5 = _________

• 64 divided by 8 = ______________

• 81 divided by 9 = _________

Figure this one!

23 kids in the class. 12 donuts in a dozen. How many dozen donuts are needed so every kid can have 2 donuts?

One more

• Pencils come in packages of 8. There are 25 kids in a class. Each child needs 3 pencils for a test. How many packages of pencils should be purchased?