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1.
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How can you use 7  2 to calculate 7  8? a. | calculate 7  2, add 7, then add 7, then add 7
again | b. | calculate 7  2, double it, then double it
again | c. | calculate 7  2, add 2, then add 2 , then add 2
again | d. | calculate 7  2, add 8, then add 8, then add 8
again |
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2.
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How can you use 3  4 to calculate 3  8? a. | calculate 3  4, add 4, then add 4
again | b. | calculate 3  4, add 8, then add 8
again | c. | calculate 3  4, then double it | d. | calculate 3  4, double it, then double it again |
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3.
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How can you use 7  10 to calculate 7  9? a. | calculate 7  10, then subtract 7 | c. | calculate 7  10, then add 9 | b. | calculate 7  10, then
subtract 9 | d. | calculate 7  10, then subtract 10 |
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4.
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How can you use 9  10 to calculate 9  9? a. | calculate 9  10, then add 10 | c. | calculate 9  10, then subtract 10 | b. | calculate 9  10, then add
9 | d. | calculate 9  10, then subtract 9 |
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5.
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How can you use 5  2 to calculate 5  8? a. | calculate 5  2, double it, then double it
again | b. | calculate 5  2, add 5, then double it | c. | calculate 5  2, then double it | d. | calculate 5  2, add 2,
add 5, then double it |
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6.
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Which strategy would you use to calculate 5  9? a. | calculate 5  3, double it, then double it
again | b. | calculate 5  2, double it, then double it
again | c. | calculate 5  10, then subtract 5 | d. | calculate 5  10, then half it |
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7.
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Which strategy would you use to calculate 4  9? a. | calculate 4  2, double it, then double it
again | b. | calculate 4  10, then subtract 4 | c. | calculate 4  2, then double it | d. | calculate 4  10, then
half it |
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8.
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Which strategy would you use to calculate 8  9? a. | calculate 9  10, then subtract 9 | b. | calculate 2  9, then double it | c. | calculate 8  10, then
subtract 9 | d. | calculate 8  10, then subtract
8 |
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9.
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How much more is 7  8 than 9  8?
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10.
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How much less is 6  7 than 6  9?
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