Ms. Garcia Math
Estimate
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A rough calculation using what you know
Mom estimated to have flour for 20 cookies
Rounding
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Change an exact number to another that is easier to write and handle
Example: Round $19.95 to the nearest whole number (
$20
)
Round Up
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Increase the terminating digit by a value of 1 and drop off the digits to the right.
If the digit is 5, 6, 7, 8, or 9, your rounding digit rounds up by one number
Round Down
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Keep the terminating digit and drop off the digits to the right.
If the digit is 0, 1, 2, 3, or 4 do not change the rounding digit.