发布时间:2019-08-10 17:47:43
17*3/7
=(14+3)*3/7
=14*3/7+3*3/7(约分)
=6+9/7
=7又2/7
答案:原式=14x3/7+14x3/7=7又2/7.
17x3/7
=(14+3)x3/7
=14x3/7+3x3/7
=6+1又2/7