Multiplying Decimals

1
Multiplying Decimals

• 1. Multiply
• 2. Move the decimal

2
Multiply Decimals

• Step 1 --- Ignore the decimal
• Step 2 --- Rewrite the problem
• Step 3 --- Multiply the problem
• Step 4 --- Underline all numbers to the right of
  decimal(s) in original problem
• Step 5 --- Move decimal that many places left in
  your answer

3
Steps 1 2

• Ignore decimals and rewrite the problem

• 4 . 5 6
• X 0 . 3 9
• 4 5 6
• x 3 9

4
Step 3

• Multiply problem without decimals
• 4 5 6
• x 3 9
• 4 1 0 4
• 1 3 6 8 0
• 1 7 7 8 4

5
Step 4

• Underline numbers to the right of decimals in
  original problem
• 4. 5 6
• x 0. 3 9
• ---------------

( 4 places)
6
Step 5

• Move decimal that many places left in answer
• 4 5 6
• x 3 9
• 4 1 0 4
• 1 3 6 8 0
• 1 7 7 8 4 ( 4 places)