问题 解答题
计算下面各题能简算的要简算
6.4÷0.8-1.5×41.9×2.34+1.9×7.661.25×6417÷[(1.2+0.5)×5].
答案

(1)6.4÷0.8-1.5×4,

=8-6,

=2;

(2)1.9×2.34+1.9×7.66,

=1.9×(2.34+7.66),

=1.9×10,

=19;

(3)1.25×64,

=1.25×8×8,

=10×8,

=80;

(4)17÷[(1.2+0.5)×5],

=17÷[1.7×5],

=17÷1.7÷5,

=10÷5,

=2.

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