• 1. (2021五上·上城期末) 计算

  ①2.75-0.75×1.2

  ②0.64×1.5÷0.32

  ③30-7.38÷3.6×2

  ④3.14×0.3²-3.14×0.2²

  ⑤2.4÷0.15+2.4÷0.25

  ⑥（0.9-0.15×0.6）÷0.01