问题 解答题

脱式计算.(能简算的要简算)

6.8×0.26+3.75

(9-2.35)×0.48

4×O.8×2.5×1.25

2.75×102.

答案

(1)6.8×0.26+3.75

=1.768+3.75,

=5.518;

(2)(9-2.35)×0.48,

=6.65×0.48,

=3.192;

(3)4×O.8×2.5×1.25,

=(4×2.5)×(O.8×1.25),

=10×1,

=10;

(4)2.75×102,

=2.75×(100+2),

=2.75×100+2.75×2,

=275+5.5,

=280.5.

单项选择题
单项选择题