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0.8x0.25x0.4x12.5 4.58➗2.5➗0.4 都...

0.8x0.25x0.4x12.5 4.58➗2.5➗0.4 都简便计算过程具体 0.8x0.25x0.4x12.5 =(0.8*12.5)*(0.25*0.4) =10*0.1 =1 4.58➗2.5➗0.4 =4.58÷(2.5*0.4) =4.58÷1 =4.58

4.5➗2.5x9/5➗0.4 =4.5x9/5÷(2.5x0.4) =8.1÷1 =8.1

8.1/(0.9x0.3) =8.1/0.27 =810/27 =30 如有帮助请采纳, 如对本题有疑问可追问,Good luck!

7/6 1/4 1/2 3/2 13/5

三.12547

0.252➗(0.84➗10.5乘以0.6) =0.252➗(0.08乘以0.6) =0.252➗0.048 =5.25

详细步骤写在纸上了

额😓

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