12+8= 15-7= 25+30= 50-3= 46+9=
60-20= 14+6= 50-40= 16+8= 18+5=
0+100= 90-30= 27+9= 45-20= 36-5=
41+3= 63+8= 80-10= 58+3= 12+6-7=
86-6= 29-5= 80+9= 72-6= 37+10=
40+40= 48+4= 11-2= 23+60= 17-3-4=
9+6= 13-5= 6+6= 8-8= 10-3+7=
18-10= 4+16= 11-5= 11-3= 2+10-8=
17-8= 7+1= 7+11= 6+0= 10+8-9=
12+6= 2+10= 15-5= 10-4= 16-3-3=
7-5= 18-8= 9+8= 0+3= 15-9=
20-10= 16-8= 8+5= 11+0= 15-0=
17-9= 83-23= 30+12= 45-20=
100-30= 55+30= 56-4= 14-8=
20+60= 88-80= 76-10= 35+4=
97-90= 75-50= 9+90= 27+50=
36+3= 17-6= 14-5= 20-7=
算式: