Răspuns:
12+42= 54 15+42=57 24+42=66 31+42=73
14+12= 29-14=15 14+24 = 31+14=
60+12= 15+60= 24+60= 31+60=
33+12= 15+33= 24+33= 64-31=33
68-34=34 99-34=65 70+5=75(sus intre 99 si 56) 75-34=41 56-34=22
68-5= 63 99-5=94 75-5=70 56-5= 51
99-87= 12 68-12=56 99-12= 87 75-12= 63 56-12= 44
68-51= 99-51= 75-51= 56-51=5
