Integer Operations – Flashcards
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If the signs are the same, add and keep that sign.
If the signs are different, subtract and take the sign of the larger absolute value.
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Addition Rule
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Add the additive inverse. Minus becomes plus negative. Minus negative becomes plus positive.
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Subtraction Rule
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Multiply or divide as usual. If the signs are the same, the answer is positive. If the signs are different, the answer is negative.
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Multiplication and Division Rule
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-14 + -22 =
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-36
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-14 + 22 =
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8
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14 + -22
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-8
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-14 - 22
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-36
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14 - 22
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-8
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14 - (-22)
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36
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-14 - (-22)
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8
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-15 x 3
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-45
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-17 x -6
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102
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12 / -6
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-2
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-45 / -3
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15
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4 + -2
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2
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-8 - -9
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1
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20 * -2
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-40
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-15 / -3
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5
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18 + -6
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12
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26 + -30
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-4
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-3 * -4
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12
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-2 * -4
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8
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-100 / 5
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-20
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-6 + -14
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-20
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-3 + -2
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-5
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-8 - -7
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-1
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3 - -4
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7
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16 - 18
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-2
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-4 - 8
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-12
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-5 - 10
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-15
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-31 * -1
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31
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50 * -2
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-100
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-12 / 4
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-3
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18 / -3
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-6
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75 / -25
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-3
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-24 / -8
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3
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-5 + -10
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-15
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-20 * -3
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60
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-7 - 3
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-10
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-1 * -654
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654
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15 + -3
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12
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18 + -19
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-1
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-10 + -20
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-30
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-30 * -2
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60
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15 - -2
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17
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16 - - 3
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19
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2 - -2
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4
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75 * -2
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-150
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4 * -5
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-20
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-6 * -8
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48
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82 / -2
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-41
