1. Multiplying Decimals
Chapter 4

2. To Multiply:
Step 1: Multiply as if the factors were whole numbers.
Step 2: Count the decimal places in all of the factors.
Step 3: Place the same amount of numbers behind the decimal in the product that was in the factors.

3. Example: 5.63 x 3.7
How many decimal places are in each factor? 1 4 2
5.63
two x
3.7
one 1 1 39 4 1 1 + 16 8 9
How many decimal places should be in the product? 2 8 3 1
three

4. Example: 0.53 x 2.618
2.618 has more digits (4) than 0.53 (3), so it goes on top.
How many decimal places are in each factor? 3 4 1 2
2.618
three x
0.53
two 1 7 8 5 4 13 9
How many decimal places are in the product? + 00 1 3 8 7 5 4
five

5. Try This: 6.5 x 15.3
Which number should go on top? 3 1 2 1
How many decimal places are in each factor?
15.3
one x
6.5
one 1 7 6 5 + 9 1 8
How many decimal places should be in the product? 9 9 4 5
two

6. Place the decimal in the product in the correct place
7.56 x 3.8 =
28728
287.28
Which one is the correct answer?
2872.8
28.728

7. Try Again!

8. Click to go to next problem.
You are correct!!
Click to go to next problem.

9. Try another
3445 x 3.9 =
134355

10. Try Again!

11. Click to go to next problem.
You are correct!!
Click to go to next problem.

12. Last one
x = 1,
16,

13. You are correct !!

15. Try Again!

16. Great Job!!