Răspuns:
a)7*3/5=21/5
b)2*5/8=10/8=5/4
c)1/3*12=12/3=4
d)7/56*14 (simplificam 7 si 14 prin 7)=1/56*2=2/56=1/28
e)3/5*1=3/5
f)2/5*3/7=3*2/5*7=6/35
g)1/9*3/5=3/45=1/15
h)4/5*11/8=44/40=11/10
i)17/10*20/3(simplificam 10 si 20 prin 10)=17/1*2/3=34/3
j)1[tex]\frac{1}{3}[/tex]*3/4=4/3*3/4=1
k)3[tex]\frac{4}{7}[/tex]*2/15=25/7*2/15(simplificam 25 si 15 prin 5)=5/7*2/3=10/21
l)9/8*1[tex]\frac{3}{5}[/tex]=9/8*8/5(simplificam 8 cu 8)=9/5
