简便计算:(2-0.125)乘以8= 360-60除以0.4=
问题描述:
简便计算:(2-0.125)乘以8= 360-60除以0.4=
答
(2-0.125)×8=2×8-0.125×8=16-1=15
360-60÷0.4=360-150=210
答
(2-0.125)×8
=(2-1/8×8
=2×8-1/8×8
=16-1
=15
360-60÷0.4
=360-60÷2/5
=360-60×5/2
=360-150
=210