Răspuns:
1) 6l+7l=13l 6l+13l=19l
2)11l-8l=3l
3) 15l-7l=8l
4) 3 sticle=1l 1sticla= 2l 1sticla=3l 5sticle= 1l
Varianta I
3sticlex1l+1sticlax2l+5sticlex1l=3l+2l+5l=10l
Varianta II
(3sticle+5sticle)x1l+1sticlax2l=(8sticlex1l)x1sticlax2l=8l+2l=10l
VariantaIII
1sticlax2l+1sticlax3l+5sticlax1l=2l+3l+5l=10l
Explicație pas cu pas: