Răspuns:
2/5=2×3/5×3=6/15
4/9=4×5/9×5=20/45
-3/7=-3×4/7×4=-12/28
5/6=5×6/6×6=30/36
Explicație pas cu pas:
1,8/3=1,8×2,5/3×2,5=4,5/7,5
-2,1/4,4=-2,1×3/4,4×3=6,3/13,2
-3,5/6,8=-3,5×1,6/6,8×1,6=-5,6/10,88
