40+8= 70+6= 60+8= 13-6= 58-8=
17-9= 12-5= 35-5= 15-7= 13-6=
17-6+6= 22-2+3= 13-0+0= 5+6-8= 44-4=
30-=22+ 51+=65-
5+32= 24-8= 41+6= 13-5=
30+70= 96-6= 7元4角+6角= 10元-5角=
9角+8角= 6元3角+5元= 2元-1元5角=
42-836 2+2+22×4 5×35+3
46+2370 58厘米1米 96厘米69厘米