问题 计算题
计算下列各题。(能简算的要简算)
(1)2.3+3.91÷(22-19.7)(2)2.5×0.32×1.25
(3)1.82×0.25+0.5×4.09(4)3.8×0.5+7.2÷0.24
答案

(1)原式=2.3+3.91÷2.3

                =2.3+1.7

                = 4(2)原式=2.5×0.4×0.8×1.25

                =1×(0.8×1.25)

                =1

(3)原式=1.82×0.25+0.25×2×4.09

                =(1.82+8.18)×0.25

                =12.5(4)原式=1.9+7.2÷0.24

                =1.9+30

                =31.9

解答题
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