问题 解答题

用简便方法计算:

0.125×0.25×8×4

7.4×0.28+0.28×2.6

15.89-3.2-6.8.

答案

0.125×0.25×8×4,

=(0.125×8)×(0.25×4),

=1×1,

=1;

7.4×0.28+0.28×2.6,

=(7.4+2.6)×0.28,

=10×0.28,

=2.8;

15.89-3.2-6.8,

=15.89-(3.2+6.8),

=15.89-10,

=5.89.

单项选择题
单项选择题