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6 Cards in this Set
- Front
- Back
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To multiply by 10 you should move the decimal point how many places to the right
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One
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To multiply by 100 you should move the decimal point how many places to the right.
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Two
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To divide by 1000 you should move the decimal how many places to the right.
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Three
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To estimate what you think the answer is what can you do to get a rough figure.
9.25 x 7 |
Round the numbers up to get an estimation.
9 x 7 |
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What is the first rule in calculating decimals?
9.25 x 7 |
Remove the decimal to make whole numbers.
925 x 7 |
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How do you work out where to put the decimal point in the product?
9.25 x 7 ----- 6475 |
Count how many numbers are after the decimal point in both numbers
9.25=2 7=0 Add them together and then move the decimal two places from the right of the answer. |
