31×0.8×0.5
14.5×102
78.3×11-78.3
56.8×0.5+0.6
1.3×2.5+0.7×2.5
0.58×101 36.45×0.8÷2.7 (6.3+0.45)÷0.9
0.19÷0.25÷0.8
32÷(9.68-9.52)
7.16×9.73+9.73×2.84
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥
①(-+)×24
②14.86﹣(6.28+2.36)﹣3.72
③÷[÷(-)]
④2.4×3.6+3.2×4.8
⑤+++......++
⑥××18×24