计算:(1) (+2)+(-8) (2) (-8.8)-(+7) (3) (46.45)+(-5.25)+18.54+(
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计算:(1) (+2)+(-8) (2) (-8.8)-(+7) (3) (46.45)+(-5.25)+18.54+(+5 1/4)
![计算:(1) (+2)+(-8) (2) (-8.8)-(+7) (3) (46.45)+(-5.25)+18.54+(](/uploads/image/z/8527085-53-5.jpg?t=%E8%AE%A1%E7%AE%97%3A%281%29+%28%2B2%EF%BC%89%2B%EF%BC%88-8%EF%BC%89+%EF%BC%882%29+%28-8.8%29-%28%2B7%29+%283%29+%2846.45%EF%BC%89%2B%28-5.25%29%2B18.54%2B%EF%BC%88)
(1) (+2)+(-8)
=2-8
=-6
(2) (-8.8)-(+7)
=-8.8-7
=-15.8
(3) (46.45)+(-5.25)+18.54+(+5又1/4)
=(46.45+18.54)+(-5.25+5又1/4)
=64.99
=2-8
=-6
(2) (-8.8)-(+7)
=-8.8-7
=-15.8
(3) (46.45)+(-5.25)+18.54+(+5又1/4)
=(46.45+18.54)+(-5.25+5又1/4)
=64.99
计算:(1) (+2)+(-8) (2) (-8.8)-(+7) (3) (46.45)+(-5.25)+18.54+(
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