①2.75×6.2+27.5×0.38
②0.125×32×2.5
③15.72-2.17-1.83+4.28
④
⑤
⑥
4.2﹣1.38+5.8﹣3.62
×16.31﹣2.31÷
(+)×4+
÷[(+)×]
1.7+3.98+5.3+2.02 (156×-26)× ×16-2÷
÷[(1+)×]
17×19×()
0.25×12.5×32
①32×12.5×2.5
②4.28+7.37+5.72+2.63
③ ÷[( - )× ]
①99.7×13+ ×13
②12.78﹣(1.17+2.78)﹣3.83
③910÷1.3×0.7
④67× ﹣9÷1.25+ ×2
①7.4﹣6.62+20.6﹣13.38
②×+×
③(-+)÷
④2×0.8×12.5×50%
⑤÷(÷+)
⑥×[1÷(+)]