17hm-84dam=?m; 320dm+900cm=?m; 3kl-745l=?l;
17 hm=1700m 320 dm=32m 3 kl=3000l
84dam=840m 900cm=9m 3 000l-745 l=2 255l
1700m-840m=860 m 32m+9m=41m
b)3/4 din 1l= 100 cl:4x3=25 clx3=75 cl
1/10 din 1 kg= 1000g:10x1=100 g
2) 2km3dam=2000m+30m=2030m
4l40cl=440cl
2t8q=2000kg+800kg=2800kg
3)L+l=240 m
L=l+20m
grafic avem
latimea l----------l }suma=240m
lungimea l----------l+20
(240m-20 m):2=220m:2=110m (l) latimea
110m+20=130m (L) lungimea
