0.175÷0.25×4
18.5÷2.5÷4
187÷(3.54+15.16)
0.37+3.23+1.77+9.63
0.58×98
35.5÷2.5÷4
29.8-4.8-5.2
1.25×32×2.5
5.5×16.3+0.37×55
①(-+)×24
②14.86﹣(6.28+2.36)﹣3.72
③÷[÷(-)]
④2.4×3.6+3.2×4.8
⑤+++......++
⑥××18×24