①48+35=
②54-36=
③45+19+7=
④85-58=
⑤54-36+22=
⑥46+32-19=
63-7= 73-8= 65-6= 47+30=
38-13= 28+50= 49+20= 19-6=
20+43= 48-30= 65-60= 35+8=
25+(42-30)= 90-50+42= 85-(45-5)= 40+6+20=
14-10= 13-6= 8+8= 77-7= 12-5+7=
9+7= 16-8= 35-5= 16-7= 58-50+30=
71-6= 35-10= 30-6= 13-7+40=
34-4= 60+18= 32+8= 67-40+5=
25+7= 87-6= 2+54= 10+6+8=