• 1. (2021五上·微山期中) 计算下面各题，能简算的要简算。

  ①17.5÷12.5×1.4

  ②0.37×2.5×4

  ③2.47×99+2.47

  ④0.86×15.6-5.6×0.86

  ⑤12.5×0.32×0.5

  ⑥32.9×10.1