17-9= | 32-30= | 15+4= | 70-40+4= |
5+43= | 46-6= | 29+20= | 16-8+20= |
70+25= | 26+40= | 89-7= | 42-2-20= |
73-70= | 7+62= | 15-7= | 4+3+60= |
23+35= 76-73= 88-72= 6+43=
20+50= | 80-30= | 58-8= | 70+6= | 91-8= |
45+3= | 36+4= | 85+30= | 54+9= | 28-6= |
23+20= | 77+5= | 24-7= | 87-50= | 25+30= |
72-9= | 23-8= | 57-40= | 45-3= | 37+8= |