问题 解答题
能简算的要简算
86.2÷12.5÷0.823.6×1.25-23.6×0.25
2.3+9.2÷(22-19.7)3.4÷[(1.2+0.5)×5].
答案

(1)86.2÷12.5÷0.8,

=86.2÷(12.5×0.8),

=86.2÷10,

=8.62;

(2)23.6×1.25-23.6×0.25,

=23.6×(1.25-0.25),

=23.6×1,

=23.6;

(3)2.3+9.2÷(22-19.7),

=2.3+9.2÷2.3,

=2.3+4,

=6.3;

(4)3.4÷[(1.2+0.5)×5],

=3.4÷[1.7×5],

=3.4÷8.5,

=0.4.

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