(6.8-6.8*0.55)/8.5简便计算
问题描述:
(6.8-6.8*0.55)/8.5简便计算
答
(6.8-6.8*0.55)/8.5
=6.8x(1-0.55)÷8.5
=6.8x0.45x2/17(约分得)
=0.4x0.9
=0.36