问题 计算题
脱式计算,能简算的要简算。
(1)0.48÷1.6×0.23(2)1.54×0.58+0.58×2.46+0.58
(3)2.5×0.8×12.5×4(4)(0.84+21.2)÷4×0.2
答案

(1)原式=0.3×0.23

                =0.069(2)原式=0.58×(1.54+2.46+1)

                =2.9

(3)原式=2.5×4×(0.8×12.5)

                =10×10

                =100(4)原式=22.04÷4×0.2

                =5.51×0.2

                =1.102

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