① =
② =
③ =
④ =
8和9
6和24
30和45
①3248÷16﹣8.4×2.5
②4.8×(+﹣)
③2.5×96
④64.8÷(22.4﹣1.7﹣15.3)
⑤×[14÷(﹣)]
⑥(+)÷×3.6
0.56÷0.8= = = =
5×( )= 30×= 0.53= 3﹣=