Đáp án+Giải thích các bước giải:
`5)` `E={24.47-23}/{24+47.23}.{3+{3}/{7}-3/11+3/1001-3/13}/{9/1001-9/13+9/7-9/11+9}`
`={(23+1).47-23}/{24+47.23}.{3+{3}/{7}-3/11-3/13+3/1001}/{9+{9}/{7}-9/11-9/13+9/1001}`
`={23.47+47-23}/{24+47.23}.{3(1+1/7-1/11-1/13+1/1001)}/{9(1+1/7-1/11-1/13+1/1001)}`
`={23.47+(47-23)}/{24+47.23}.{3}/9`
`={23.47+24}/{24+47.23}.{3}/9`
`=3/9=1/3`