问题 解答题
递等式计算(能简便运算的要简便运算
3.6×0.25×1.258.7×10.1(87.5+12.5)×0.89.6×6.2+0.96×38.
答案

(1)3.6×0.25×1.25,

=4×0.9×0.25×1.25,

=(4×0.25)×(0.9×1.25),

=1×1.125,

=1.125;

(2)8.7×10.1,

=8.7×10+8.7×0.1,

=87+0.87,

=87.87;

(3)(87.5+12.5)×0.8,

=100×0.8,

=80;

(4)9.6×6.2+0.96×38.

=9.6×6.2+9.6×3.8,

=9.6×(6.2+3.8),

=9.6×10,

=96.

单项选择题
单项选择题