①7.004万 ②700400 ③0.7004亿 ④70400000 ⑤7.00004亿 ⑥7.04万
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)÷ ]