a - b = 55
a : b = 6
a = 6×b
6×b - b = 55
5×b = 55
b = 55 : 5
b = 11
a = 55 + 11 = 66
sau metoda grafica:
a |___|___|___|___|___|___|
b |___|
avem 6 segmente egale - 1 segment egal = 5 segmente egale = 55
55 :5 = 11 (un segment egal)
a = 6 × 11 = 66
b = 11
Verificare:
66 -11 = 55
66 : 11 = 6
a = 66
b = 11
