Question

teodor are 3 mingi de ping-pong si 2 mingi tenis si a platit 22 lei.Andrei are 2 mingi de ping-pong si 2 mingi tenis si a platit 20 lei.Afla cati lei este o minge de ping-pong si cati lei uns de tenis.

Answer 1

cat costa 3 mingi de ping pong ? 40-22=18lei
cat costa o minge de ping pong ? 18:3=6lei
cat costa 2 mingi de tenis.........? 22-18=4lei
cat costa o minge de tenis.........? 4:2=2lei

Answer 2

3 m p ..............2 m t ...............22 lei
2 mp ...............2 m t ................20 lei
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1 m p .............................................2 lei
3 mingi ping - pong = 3 x 2 = 6 lei
2 mingi tenis = 22 - 6 =16 lei
1 minge tenis = 16:2 = 8 lei