• 1. (2023五上·海丰期中) 计算下面各题，能简算的要简算。 

  ① 9.7－22.78÷3.4 

  ② 7.3÷1.25÷0.8 

  ③ 5.6×10.1 

  ④ 6.1×0.64＋0.36×6.1