38-8= 30 38-10=28 38-5=33
60-53=7 54-54=1 70-53=17
29+1=30 29+10=39 29+20=49
10+30=40 20+30=50 30+30=60
38-8= 30 38-10=28 38-5=33
60-53=7 54-54=1 70-53=17
29+1=30 29+10=39 29+20=49
10+30=40 20+30=50 30+30=60