Question

danait cum fac????
dau 5 stele!​

Answer 1

Răspuns:

5 kg mere............17,5 lei

7,5 kg mere...............x

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x=7,5×17,5:5=26,25 lei

sau

cati lei costa 1 kg de mere?

17,5:5=3,5 lei

cati lei costa 7,5 kg mere?

3,5×7,5=26,25 lei

0,(1)=1/9

1 muncitor..........1/9 lucrare

3 muncitori............x

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x=3×1/9=3/9=1/3 lucrare

sau

1/9+1/9+1/9=3/9=1/3