脱式计算(能简算的药简算) 12.5×0.4×2.5×8 0.87×6.6+8.

2024年12月02日 18:02
有1个网友回答
网友(1):

(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.