竖式计算:(先估算再计算)1+11.9 10.2﹣8.75 10﹣3.14 14.65﹣7.39.
(1–×)÷ [(1–)×]÷4
[(1–)×]÷4++
(–)÷(+)[1–(+)]÷3.5
25÷(–)+–
–(+)×–