ajutor!!! imi poate explica careva??? nu inteleg

Răspuns:
1/3 din 120=40lei 2/3din 120=80lei
1/3fin 240=80zile 2/3din 240=160zile
1/3fin 360m=120m 2/3din 360=240m
1/3din 720kg=240kg 2/3din 720kg=480kg
1/3din 480l=160l 2/3din 480l=320l
ti am facut primul rand continua tu cu celelalte