1) (3/10+3/100)*1/100=
(3*10/10*10+3/100)*1/100=
(30/100+3/100)*1/100=
33/100 * 1/100=
33*1/100*100=
33/1000
2)1/(1+1/(1+1/(1+1/3)))=
1/(1+1/(1+1/(3/3+1/3)))=
1/(1+1/(1+1/(4/3)))=
1/(1+1/(1+1*3/4))=
1/(1+1/(1+3/4))=
1/(1+1/(4/4+3/4))=
1/(1+1/(7/4))=
1/(1+1*(4/7))=
1/(1+4/7)=
1/(7/7+4/7)=
1/(11/7)=
1*7/11=
7/11
3) 9/10 * 5/33 :9/16=
9/10 * 5/33 * 16/9=
9*5*16/(10*33*9)=
5*16/(10*33)=
80/(10*33)=
8/33