①(-+)×24
②14.86﹣(6.28+2.36)﹣3.72
③÷[÷(-)]
④2.4×3.6+3.2×4.8
⑤+++......++
⑥××18×24
72﹣3.5+28﹣6.5
22.3×4÷22.3×4
24×(+)
﹣×