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When adding a positive and a positive... |
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Just add the 2 numbers and use the same sign. |
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+8 + +2 = |
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+10 |
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When adding a positive and a negative... |
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Subtract the 2 numbers and use the sign of the number with the greater absolute value. |
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+8 + -12 = |
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-4 |
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When subtracting integers... |
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Change the minus sign to addition, and the second integer to its opposite, then follow addition rules. Don't change the first number. |
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-5 - +16 Changes to what? |
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-5 + -16 |
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-15 - -20 = |
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+5 |
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When multiplying or dividing integers with the same sign the answer is always... |
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positive |
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When multiplying or dividing integers with different signs the answer is always... |
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negative. |
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+12 x +3 = |
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+36 |
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-15 x +3 = |
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-45 |
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-20 x -3 = |
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+60 |
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When adding a negative and a negative... |
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Just add the numbers and use the same sign (negative.) |
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-20 + -3 = |
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-23 |
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-40 / -4 = |
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+10 |
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-35 / +7 = |
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-5 |
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+3x - +2=
(when x = -3) |
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-11 |
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4 - 5a
(when a = -1) |
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+9 |
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x / -10 = 12 |
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x = - 120 |
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r + 56 = - 30 |
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r = - 86 |
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p - 93 = 12 |
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p = 105 |
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6h = -48 |
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h = -8 |
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