问题 解答题
脱式计算,能简算的要简算
4.57+3.34÷0.21.68÷0.25÷0.4
2.5×0.7+7.5×0.70.125×0.32×0.25.
答案

(1)4.57+3.34÷0.2

=4.57+16.7,

=21.27;

(2)1.68÷0.25÷0.4

=1.68÷(0.25×0.4),

=1.68÷0.1,

=16.8;

(3)2.5×0.7+7.5×0.7

=(2.5+7.5)×0.7,

=10×0.7,

=7;

(4)0.125×0.32×0.25

=(0.125×0.8)×(0.4×0.25)

=0.1×0.1,

=0.01.

问答题
单项选择题