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MULTIPLICATION
In this lesson
you will learn how to:
In order to learn the rules for
multiplying decimals, we need to review three key definitions:
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decimal places: |
the
numbers to the right of the decimal point. e.g. tenths,
hundredths, thousandths, etc.
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partial products: |
the products
formed when multiplying by the different place values in a long
multiplication problem ( more than 1 place)
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factors |
the two numbers that when
multiplied together give a product:
factor x factor = product
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Now the
rule for multiplying decimals: The product of two decimal numbers
has the same number of decimal places as the number of decimal places in
both factors. The partial products have no decimal points in them.
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When multiplying 4 x 0.89, the product
would have 2 decimal places. |
0.89 2 decimal
places
x 4
+
0 decimal places
3.56
2 decimal places |
| When
multiplying 1.76 x 3.02, the product would have 4 decimal
places. |
1.76
2 decimal places
x 3.02
+2
decimal places
352
5280
5.3152
4 decimal places |
| When
multiplying 0.893 x 0.7, the product would have 4 decimal
places. |
0.893
3 decimal places
x 0.7
+1
decimal places
0.6251
4 decimal places |
Enough examples? Ready to try some
problems on your own?
Decimal Multiplication Practice!
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