1. Multiplying Decimals
Textbook page 120

2. How do we multiply by decimals?
To multiply by a decimal we:
multiply like we do with whole numbers
then we place the decimal by counting decimal units

3. Example 1: Something that is 1 lb on Earth weighs 0. 17 lb on the Moon
Example 1: Something that is 1 lb on Earth weighs 0.17 lb on the Moon. How much does a 3 lb flag weigh on the Moon?
3 x 0.17
0.17 *multiply
x 3 * count places
0.51 We put two digits
behind the decimal
because the question
had a total of two
places behind the
decimal.

4. Example 2: Find each product
unit
x unit
units
(B) 0.05 x 0.9
units
x unit
units

5. Example 3: Evaluate 3x for each value of x
units x
units
(B) x = 2.95
units
x 3
units