①(980-109)×12
②600×(643-489)
③224÷56+256
④700÷28+91
⑤200-150÷25×2
⑥25×40÷40×25
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥
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)÷ ]
①8×2.5×0.125÷
②(+﹣)×24
③6.5÷×
④(+)×+
⑤4×(﹣)×9
⑥÷7+×