8/3*(1/3-8/21*0.5)简算
问题描述:
8/3*(1/3-8/21*0.5)简算
答
3/8/×(1/3-8/21×0.5)
=3/8/×(1/3-4/21)
=3/8/×1/3-3/8×4/21
=1/8-1/14
=3/56