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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!

()+()=8++()+()=6||||138设:x+y=8,z+w=6,x+z=13,y+w=8则:x+y=8(1)x+z=13(2)z+w=6(3)y+w=8(4)(4)-(3):y-z=2(5)(1)-(2):y-z=-5(6)(5)(6)矛盾因此原方程组无解

=0.45➗(10➗4) =0.45➗10✖️4 =0.045✖️4 =0.18

(8.25-37.5)➗2.5➗4 =(8.25-37.5)➗(2.5x4) =-29.25➗10 =-2.925

5.2和10

Ax0.5=B➗1.5=C➗2.5=Dx2,A、B、C、D四个数中,最大的是( C) 假设Ax0.5=B➗1.5=C➗2.5=Dx2=1 则A=2 B=1.5 C=2.5 D=0.5

详细步骤写在纸上了

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