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10 Cards in this Set
- Front
- Back
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11 |
add the neighbor
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12
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double the number and add the neighbor
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6
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Add 5 to the number if odd; add half the neighbor
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7 |
double the number and add 5 to the number if odd; add half the neighbor
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5
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use half the neighbor, plus 5 if the number is odd
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9
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first step: subtract from 10
middle steps: subtract from 9 and add the neighbor last step: reduce left-hand digit of multiplicand by 1 |
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8
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first step: subtract from 10 and double
middle steps: subtract from 9, double, and add the neighbor last step: reduce left-hand digit of multiplicand by 2 |
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4
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first step: subtract from ten, and add 5 if the number is odd
middle steps: subtract from 9 and add half the neighbor, plus 5 if the number is odd last step: take half of the left-hand digit of the multiplicand and reduce by 1 |
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3 |
first step: subtract from 10 and double, and add 5 if the number is odd
middle steps: subtract from 9 and double, add 5 if the number is odd, and add half the neighbor last step: take half the left-hand digit of the multiplicand and reduce by 2 |
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2
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double each digit of the multiplicand
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