问题 解答题
脱式计算(能简算的药简算)
12.5×0.4×2.5×80.87×6.6+8.7×0.349.07-22.78÷3.4.
答案

(1)12.5×0.4×2.5×8,

=(12.5×8)×(0.4×2.5),

=100×1,

=100;

(2)0.87×6.6+8.7×0.34,

=0.87×6.6+0.87×10×0.34,

=0.87×6.6+0.87×3.4,

=0.87×(6.6+3.4),

=0.87×10,

=8.7;

(3)9.07-22.78÷3.4,

=9.07-6.7,

=2.37.

单项选择题
单项选择题