1. Multiply Decimals by Whole Numbers Multiply Decimals by Decimals
Objective: I will multiply multi- digit decimals using standard algorithm
MAFS.6.NS.2.3: Fluently add, subtract, multiply,
and divide multi-digit decimals using the standard
algorithm for each operation.

2. Do Now
Something that weighs 1 lb on Earth weighs 0.17 lb in the moon. How much would a 4 lb dumbbell weigh on the moon?

3. Multiplying Decimals
Vocabulary:
Product: the result of multiplying.

4. Multiplying Decimals
Andrew runs 2.25 miles. Isabella walks 5 times as far. How far does Isabella walk?
Data: 2.25 (decimal) 5 (whole number)
Step 1: Ignore decimal points and multiply as you would with whole numbers.
2.25 (2 decimal points)
x 5 (0 decimal points)

5. Multiplying Decimals
Step 2: Find the total number of decimal places in both numbers.
Total 2 decimal places
Step 3: Place the decimal point so that the number of decimal places in the product equals the total number of decimal places in the factors.
11.2 5

6. Multiplying Decimals Your turn: Find the product 0.3 x 0.4 0.07 x 0.8

7. Multiplying decimals
Reflection: Describe a situation that involves multiplication of decimals and write a word problem about it.