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4(x一0.8)=9.8

4(x-0.8)=9 x-0.8=9 ÷ 4 x-0.8=2.25 x=2.25+0.8 x=3.05

用4,2,0,0,0,0,8,9八个数字,按要求写出八位数。(每种只写出一个) 1、最小的数:(2000 0489) 2、最大的数:(9842 0000) 3、最大数和最小数的差:(7841 9511) 4、一个0也不读的数:(9842 0000) 5、只读一个0的数:(9084 2000) 6...

8.1×0.6+9.4 =4.86+9.4 =14.26 你好,本题已解答,如果满意 请点右下角“采纳答案”。

9.8-9.8x0.4简便计算 9.8-9.8x0.4 =9.8*(1-0.4) =9.8*0.6 =5.88

54.9×0.38 =20.862 4.05+37.85 =41.9 1.25×0.7x0.8 =1 ×0.7 =0.7 9.8×2.5 =25-0.5 =24.5 6.1×3.6+3.6x3.9 =3.6 x(6.1+3.9) =3.6 x10 =36 2.96x40 =3*40-0.04*40 =120-1.6 =118.4

解:因为X~N(3, 4),则(X-3)/2 ~ N(0, 1)(标准正态分布), P(5

0.1+0.2+0.3+0.4+......+9.7+9.8 =0.1x(1+2+3+....+98) =0.1x(1+98)x98/2 =0.1x99x49 =9.9x49 =(10-0.1)x49 =10x49-0.1x49 =490-4.9 =485.1 谢谢,请采纳

0.4x+1.8=9.8 0.4x=9.8-1.8 0.4x=8 x=8÷0.4 x=20

16.4÷0.8*1.9 =1.9*20.5 =1.9*(20+0.5) =1.9*20+1.9*0.5 =38+0.95 =38.95

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