Q1次の計算をしなさい。
(1) (+9)−(+5)
=(+9)+(−5)
=+4 |
(2) (+2)−(+8)
=(+2)+(−8)
=−6 |
(3) (−6)−(+3)
=(−6)+(−3)
=−9 |
(4) (−7)−(+7)
=(−7)+(−7)
=−14 |
(5) 0−(+6)
=0+(−6)
=−6 |
(6) (+2)−0
=+2 |
<戻る>
Q2次の計算をしなさい。
(1) (+3)-(-6)
=(+3)+(+6)
=+9 |
(2) (-3)-(-6)
=(-3)+(+6)
=+3 |
(3) (-7)-(-1)
=(-7)+(+1)
=-6 |
(4) (-4)-(-4)
=(-4)+(+4)
=0 |
(5) 0-(-2)
=0+(+2)
=+2 |
(6) (-3)-0
=-3 |
Q3次の計算をしなさい。
(1) (+12)-(-2)
=(+12)+(+2)
=+14 |
(2) (-13)-(+5)
=(-13)+(-5)
=-18 |
(3) 0-(-12)
=0+(+12)
=+12 |
(4) (-2.5)-(-3.5)
=(-2.5)+(+3.5)
=+1 |
(5) ![](s9_3.gif) |
(6) ![](s9_4.gif) |
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