计算下面各题，能简便计算的要简便计算（0.18+0.9）÷9=13÷（19+112）=1114-35+314-25=920÷（1017×45）=

Question

计算下面各题，能简便计算的要简便计算
（0.18+0.9）÷9=
(1)/(3)÷（(1)/(9)+(1)/(12)）=
(11)/(14)-(3)/(5)+(3)/(14)-(2)/(5)=
(9)/(20)÷（(10)/(17)×(4)/(5)）=

Answer 1

①（0.18+0.9）÷9
=（0.18+0.9）×(1)/(9)
=0.18×(1)/(9)+0.9×(1)/(9)
=0.02+0.1
=0.12

②(1)/(3)÷（(1)/(9)+(1)/(12)）
=(1)/(3)÷（(4)/(36)+(3)/(36)）
=(1)/(3)×(36)/(7)
=(12)/(7)

③(11)/(14)-(3)/(5)+(3)/(14)-(2)/(5)
=（(11)/(14)+(3)/(14)）-（(3)/(5)+(2)/(5)）
=1-1
=0

④(9)/(20)÷（(10)/(17)×(4)/(5)）
=(9)/(20)×(17)/(8)
=(153)/(160)