①140×20=
②330×30=
③280÷7=
④407×51≈
⑤600×4=
⑥50×400=
⑦7200÷8=
⑧88×401≈
①(227+49)÷12 ②864÷[(32-28)×12]
③88×125 ④24×97+24×3
A.80% B. C. D.25%