Thursday, January 04, 2007

Notes on Solving Problems with Decimals

1. Line up the decimal points.
2. Bring down the decimal.
3. Add/subtract as normal.
*Tip: Turn your paper on its side to help align the numbers.

1. Multiply as normal. Operation
2. Count up total decimal places in the problem. Post-Op
3. Move the decimal that many places into your product.
*You don't have to line up the decimal when multiplying.

1. Move the decimal in the divisor to create a whole number. Pre-Op
2. Move the decimal in the dividend the same number of places.
3. Pull up decimal for the quotient. "Set it and forget it!"
4. Divide as normal. Operation
*Tip: It may help to rewrite the problem before starting Step 3 to get rid of unnecessary zeros.

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