Multiplying Decimals

Find the Product

100

4.1 x 0.5 = 

2.05

200

1.1 x 2.2 =

2.42

300

82.1 x 0.3 =

24.63

400

92.1 x 0.2

18.42

500

27.23 x 0.55 =

14.9765

Steps

100

What is Step 1 to multiplying decimals?

Remove Decimals

200

What is Step 2 to multiplying decimals?

Multiply 

300

What is Step 3 to multiplying decimals?

Place the decimal in the answers

400

How do you know how many places are being the decimals in the answer?

Count up the decimals in the original problem.

500

List all the steps to multiplying decimals. 

Step 1: Remove Decimals

Step 2: Multiply

Step 3: Place the Decimal in the answer.

Find the Mistake

100

2.21 x 3 = 6.61

6.63

200

4.32 x 3 = 10.96

12.96

300

5.64 x 4 = 22.46

22.56

400

6.75 x 5 = 30.75

33.75

500

8.76 x 8 = 70.08

There is no error!

Powers of Ten

100

4 x 10 x 10 x 10 x 10 

4 x 10⁴ = 40,000

200

11.6 x 10²=

1,160

300

6 x 10⁵

600,000

400

2 x 0.3=

2 x 3 x 0.1

500

0.5 × 101 = ■ 

0.5 × 102 = ■ 

0.5 × 103 = ■

5; 50; 500