Question

Intr o curte sunt 27 pasari :gaini si rate Stiind ca sunt cu 7 gaini mai multe decat rate,sa se afle cate gaini si cate rate sunt?

Answer 1

27-7=20 {EGALAM PARTILE }  20;2=10 RATE       10+7=17 GAINI    
 PROBA:  10+17=27

Answer 2

rate-|__|
            +7    }27 pasari
gaini-|__|_|
rezolvare 
1.egalam segmentele
27-7=20
2.aflam cite rate sunt 
20:2=10
3.aflam cite gaini sunt 
10+7=17
verificare : 10(rate)+17(gaini)=27(pasari)
raspuns : 10 rate
               17 gaini