Explicație pas cu pas:
a) 2/3 : 4/9 =2/3×9/4=
=2/4×9/3=1/2×3=3/2
b) 1/8 : 3/4=1/8×4/3=
=4/8×1/3=1/2×1/3=1/6
c) 3/5 : 2/5=
=3/5×5/2=3/2×5/5=3/2×1=3/2
d) 7/2 : 1/4=
7/2×4/1=7/1×4/2=7×2=14
e) 12)5 :3=
=12/5×1/3=12/3×1/5=4×1/5=4/5
f) 77/27 : 34/12=
=77/27×12/34=77/34×12/27=
=77/34×4/9=(77×4)/(34×9)=
=308/306==154/153
cred că ai scris ceva greșit
g) 7 2/19 : 18/25=
=(7×19+2)/19:18/25=
=154/19×25/18=
=154/18×25/18=
=77/9×25/18=
=(77×25)/(9×18)=
=1925/162
și aici e scris ceva greșit
g 9/12 : 2 9/18
9/12=3/4
2 9/18=(2×18+9)/18=45/18=5/2
=3/4÷5/2=3/4×2/5=
=3/5×2/4=3/5×1/2=3/10
