-2[-4+(2-2/3乘0.6)除以(-3)]等于多少?
问题描述:
-2[-4+(2-2/3乘0.6)除以(-3)]等于多少?
答
2[-4+(2-2/3乘0.6)除以(-3)]=-2{-4+{(2-2/5)/(-3)]}=-2[-4+(8/5)/(-3)]-2(-68/15)=136/15,也就是9又1/15
答
-2[-4+(2-2/3乘0.6)除以(-3)]
=-2[-4+(2-0.4)除以(-3)]
=-2[-4+1.6除以(-3)]
=-2[-4-8/15]
=-2×(-4又8/15)
=9又1/15