21.6-21.6×0.5÷2
=21.6-21.6×0.25
=21.6×(1-0.25)
=21.6×0.75
=16.2
你好,本题已解答
如满意,请点采纳
首先计算0.5/2=1/4,再将相同的数字提出来,21.6×(1-1/4)=21.6×3/4=16.2
21.6-21.6×0.5÷2怎样简便运算?
先提取公因子,再按四则运算规则依次计算:
原式=21.6*(1-1*0.5/2)
=21.6*(1-1/4)
=21.6*3/4
=5.4*3
=16.2
21.6-21.6×0.5÷2
=21.6-5.4
=16.2