completeaza tabelul

Răspuns:
15+2=17
15+13=28
15+11=26
15+12=27
16+2=18
16+13=29
16+11=27
16+12=28
12+2=14
12+13=25
12+11=23
12+12=24
4+2=8
4+13=17
4+11=15
4+12=16