1.25×32×0.25
(2512+5066÷17)×554
.
网友回答
解:(1)1.25×32×0.25,
=1.25×8×4×0.25,
=(1.25×8)×(4×0.25),
=10×1,
=10;
(2)(2512+5066÷17)×554,
=(2512+298)×554,
=2810×554,
=1556740;
(3)(2-0.5)÷[(1.2+1.55)×],
=÷[2.75×],
=÷,
=1;
(4)+(),
=+,
=+,
=.
解析分析:(1)根据乘法结合律和交换律进行计算,
(2)(3)(4)根据四则运算的计算顺序进行计算,
点评:本题综合考查了学生在四则运算中灵活运用简便算法的能力,注意计算结果的准确性.