Question

Afla caturile,folosind scadere Repetata, apoi verifica ,folosind inmultirea : 21:3 /36:4/42:6 /49:7/63:7/56:8/54:6/81:9

Answer 1

21:3=7
21-3-3-3-3-3-3-3=0
7x3=21
36:4=9
36-4-4-4-4-4-4-4-4-4=0
9x4=36
42:6=7
42-6-6-6-6-6-6-6=0
7x6=42
49:7=7
49-7-7-7-7-7-7-7=0
7x7=49
63:7=9
63-7-7-7-7-7-7-7-7-7=0
9x7=63
56:8=7
56-8-8-8-8-8-8-8=0
7x8=56
54:6=9
54-6-6-6-6-6-6-6-6-6=0
9x6=54
81:9=9
81-9-9-9-9-9-9-9-9-9=0
9x9=81