题目内容

计算下面各题,能简算的要简算。
(1)18.3-9.928+21.7-3.072 (2)2.8×99
(3)57.6÷(0.4×0.036) (4)[(12-0.5)+2.5×3-19]÷9.5
(1)原式=18.3+21.7-(9.928+3.072)
                = 40-13
                =27
(2)原式=2.8×(100-1)
                =280-2.8
                =277.2
(3)原式=57.6÷0.0144
                = 4000
(4)原式=(11.5+7.5-19)÷9.5
                =0
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