-12×(1/4-1/3-1/2)简便计算过程也要
发布网友
共2个回答
热心网友
=-12x1/4+12x1/3+12x1/2
=-3+4+6
=1+6
=7
热心网友
=-12×(3/12-4/12-6/12)
=-12×(-7/12)
=12×7/12
=7
