Đáp án + Giải thích các bước giải:
`55/11.16+55/16.21+55/21.26+55/26.31+55/31.36+55/36.41`
`=11(5/11.16+5/16.21+5/21.26+5/26.31+5/31.36+5/36.41)`
`=11(1/11-1/16+1/16-1/21+1/21-1/26+1/26-1/31+1/31-1/36+1/36-1/41)`
`=11(1/11-1/41)`
`=1-11/41`
`=41/41-11/41`
`=30/41`