Răspuns:
a) 5×7/10=35/10(se simplifica cu 5)=7/2
b) 4×5/2=20/2(se simplifica cu 2)=10
c) 9×5/18=45/18( cu 9)=5/2
d 9×4/21=36/21(cu 3)=12/7
e) 10×2/15=20/15(cu 5)=4/3
f) 14×3/7=42/7(cu7) =6
g) 4/7×7/22=28/154(cu 7)=4/22(cu 2)=2/11
h) 16/3×9/28=144/84(cu 12)=12/7
i) 15/14×1/3=15/42(cu 3)=5/14
j) 81/10×1/6=81/60(cu 3)=27/20
