(1+1\2-37.5%)÷[1\25+(40%+2.1)]简便算法
问题描述:
(1+1\2-37.5%)÷[1\25+(40%+2.1)]简便算法
递等式,简算!
答
=(1+0.5-0.375)/(0.04+0.4+2.1)
=1.125/2.54
=1125/2540
=225/508
=0.443