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OPERATIONS WITH DECIMALS
Using Base Ten Blocks to Multiply Decimals
Flat = one (1) Long = one tenth (0.1)
rod = one hundredth (0.01)
Multiplying Decimals by Whole Numbers
Tenths
Multiply 5 x 0.3
Shade in 0.3 five times using a different color each time.
5 x 0.3 = 1.5
4 x 0.6
4 x 0.6 = 2.4
3 x 0.7
Shade in 0.7 three times using a different color each time.
3 x 0.7 = 2.1
On Your Own
Use tenth grids to do the following problems:
1. 2 x 0.9 2. 3 x 0.7
3. 9 x 0.2 4. 10 x 0.3
5. 7 x 0.5 6. 8 x 0.8
Multiplying Decimals by Whole Numbers Using
Models
Hundredths
Multiply 4 x 0.19
Shade 0.19 four times .
4 x 0.19 = 0.76
Multiply 5 x 0.25
Shade 0.25 five times .
5 x 0.25 = 1.25
Multiply 3 x .35
3 x .35 = 1.05
On Your Own
Use hundredth grids do the following problems:
1. 4 x 0.63 2. 6 x 0.19
3. 2 x 0.94 4. 7 x 0.51
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