算一算。20+30=67-7=53-50=2+70=35-5=20+8=80-20=59-50=
正确答案:
(50)(30)(60)(28)(3)(60)(72)(9)
算一算20+30=67,7=53,50=2+70=35,5=20+8=80,20=59,50=,一年级数学
时间:2017-12-08