问题 解答题
递等式计算
0.7+9.6×0.25(2.44-1.8)÷0.4×2.5
23.4-0.8-13.4-7.2[3.2-3.2×(30.4-29.85)]÷1.8.
答案

(1)0.7+9.6×0.25,

=0.7+2.4,

=3.1;

(2)(2.44-1.8)÷0.4×2.5,

=0.64÷0.4×2.5,

=1.6×2.5,

=4;

(3)23.4-0.8-13.4-7.2,

=(23.4-13.4)-(0.8+7.2),

=10-8,

=2;

(4)[3.2-3.2×(30.4-29.85)]÷1.8,

=[3.2-3.2×0.55]÷1.8,

=[3.2-1.76]÷1.8,

=1.44÷1.8,

=0.8.

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