Răspuns :
METODA GRAFICA
a /__/__/__/
b /__/__/__/ + 5
c /__/
68 - 5 = 63
63 : 7 = 9
3 × 9 = 27 ( a )
3 × 9 + 5 = 32 ( b )
1 × 9 = 9 ( c )
Verificare : 27 + 32 + 9 = 68
a /__/__/__/
b /__/__/__/ + 5
c /__/
68 - 5 = 63
63 : 7 = 9
3 × 9 = 27 ( a )
3 × 9 + 5 = 32 ( b )
1 × 9 = 9 ( c )
Verificare : 27 + 32 + 9 = 68