(4/5+1/4)÷7/3+7/10=(16/20+5/20)÷7/3+7/10=21/20×3/7+7/10=9/20+14/20=23/20化为小数为1.15
(4/5+1/4)÷7/3+7/10=21/20x3/7+7/10=9/20+14/20=23/20
如图所示望采纳