Question

rezolva exercitile dupa model
1) 7 vaci si 14 oi consuma intr-o zi 182 kg nutret iar 10 vaci si 7 oi au consumat 156 kg. Cate kg a consumat pe o zi o vaca si cate kg o oaie?
2) 12 gaini si 10 rate consuma intr-un an 13 000 kg graunte iar 18 gaini si 12 rate consuma 17 400 kg. Cate kg consuma pe an gaina? Dar o rata?

Answer 1

Raspuns:

7vaci.......14oi......182kg

10vaci......7oi.......156kg

Multiplicam 2rand cu 2

20vaci....14oi.......312kg

13vaci....................130kg

1vaca..........130÷13=10kg

7vaci.............7×10=70kg

14oi...........182-70=112kg

1oaie............112÷14=8 kg

12gaini.......10rate.......13000kg

18gaini.......12rate.......17400kg

Multiplicam 1rand cu 6, iar al doilea cu 5 si le adunam:

72gaini.......60rate.........78000kg

90gaini......60rate..........87000kg

18gaini...87000-78000=9000kg

1gaina.................9000÷18=500kg

12gaini................500×12=6000kg

10rate.........13000-6000=7000kg

1rata......................7000÷10=700kg