Efectueaza in doua moduri (30+9):3= (50+5):5= (70+7):7=


Răspuns: 1
39:3=13 sau 30÷3+9÷3=13
55÷5=11 sau 50÷5+5÷5=11
77÷7=11 sau 70÷7+7÷7=11