①5.6-0.71-0.29
②14.56-2.99
③6.23-2.36+3.5-0.64
④6.48×99+6.48
⑤6000÷125÷8
⑥15×24×125
①250-250÷25×2
②18÷ ×
③5.2÷0.4÷2.5
④(34- )÷17
⑤4.3×1.75-1.75+ ×6.7
⑥ ×[(72.8-69.6)÷ ]
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1
①36×()
②1.3×37.5%+2.7×
③ [()]
④13÷()×