问题 解答题
脱式计算.
8.6÷0.86+10×0.53.75-(0.2+7.8)×0.325.5÷[(10-8.98;)×2.5].
答案

(1)8.6÷0.86+10×0.5,

=10+5,

=15;

(2)3.75-(0.2+7.8)×0.3,

=3.75-8×0.3,

=3.75-2.4

=1.35;

(3)25.5÷[(10-8.98)×2.5],

=25.5÷[1.02×2.5],

=25.5÷2.55,

=10.

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