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)÷ ]
0.125+= ﹣= 8×75%= 3÷=
2﹣20%= 0.72÷0.8= ×= 5%÷=