Question

Un autotorism si un tractor consuma intr-o ora 14 l de motorina.Autotorismmul consuma cu 2 l mai putin decat tractorul. Cati litri de motorina consuma fiecare?  

Answer 1

A+T=14
A-Autoturism
T-tractor

A       I____I
T       I____I+2

Cat consuma autoturismul?
(14-2):2=12:2=6 litri
Cat consuma tractorul?
6+2=8 litri

6+8=14

Answer 2

A+T=14
A-Autoturism
T-tractor

A       I____I
T       I____I+2

Cat consuma autoturismul?
(14-2):2=12:2=6 litri
Cat consuma tractorul?
6+2=8 litri

6+8=14