Răspuns:
Prima coloană :
21-5=16
15-7=8
21-8=13
21+15=36
Coloana 2:
54-7=47
63-6=57
54-16=38
54+63=117
Coloana 3:
40-4=36
32-5=27
40-12=28
40+32=72
Coloana 4:
30-9=21
45-6=39
30-14=16
30+45=75
Coloana 5:
32-9=23
36-8=28
32-13=19
32+36=68
