Multiplying Decimals

Multiplying Decimals

Let's Practice Multiplying Decimals!!

Open Ended

When multiplying decimals, which number do I put on top?

Poll

Do I have to keep my decimals lined up?

• Yes

• No

When Multiplying Decimals You.....

• Place the decimal with the most digits (number) on top

• You don't have to line up your decimals but you want to set your problem up as if you are multiplying whole numbers using long multiplication.

Long Multiplication

This is what long multiplication look like....

Long Multiplication with Decimals

The concept of long multiplication doesn't change...

Poll

What number is my place holder?

• 1

• 2

• 3

• 0

Place Holder

When you are multiplying using long multiplication you want to make sure you place a zero underneath the last number of the first value. This zero shows that you have completed the first step of long multiplication.

Open Ended

What is 0.52 x 80 = (notice that this is 80 and not 0.80)

Open Ended

What is 7.65 x 0.88 =

Open Ended

What is 1.30 x 2.5?

Poll

How do you feel about multiplying decimals?

• Great!!!

• Kind of great.

• Not so great...

• I don't know what I am doing...