17-12=

20+30=

42-2=

15-10=

15+3=

18-8=

5+15=

20-9=

90+5=

10-7=

90-60=

20-9=

12+7=

13+7=

15+5=

12+3=

20-5 =

13-12=

4+12=

14-6=

5+15=

10-2=

20+70=

14+11=

60+8=

12+7=

19-16=

40+30=

17+3=

20-12=

65+5=

20-4=

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