• 1. (2020五上·江门月考) 怎样简便怎样算。

  ①0.25×9.87×4

  ②5.81×5.6＋2.19×5.6

  ③0.94×2.5-0.45 

  ④1.73×10.2

  ⑤12.56÷5÷0.4

  ⑥32×12.5×2.5