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3.10.9

=3/4X10/9 =5/6 =5:6

3/10*98 =3/10x(100-2) =3/10x100-3/10x2 =30-3/5 =29又2/5

用3,6,9,10算24点,共有34种算法。 6×[3-﹙9-10﹚] [﹙3+10﹚-9]×6 ﹙3-9﹚×﹙6-10﹚ ﹙9×6﹚-﹙10×3﹚ [﹙3-9﹚+10]×6 [3+﹙10-9﹚]×6 [10+﹙3-9﹚]×6 [﹙10-9﹚+3]×6 [9÷﹙3÷10﹚]-6 9×[6-﹙10÷3﹚] ﹙10-6﹚×﹙9-3﹚ ﹙9...

解 9/10-(3/10+3/8) =9/10-3/10-3/8 =6/10-3/8 =3/5-3/8 =24/40-15/40 =9/40

白细胞的正常范围:成人 (4.0~10.0)×109/L; 儿童 (5.0~12.0 )×109/L; 新生儿(15.0~20.0)×109/L。

10/9-(10/3+8/3) =10/9-18/3 =10/9-6 =10/9-54/9 =-44/9 =-4又8/9 9/10-(3/10+3/8) =9/10-3/10-3/8 =6/10-3/8 =3/5-3/8 =24/40-15/40 =9/40 谢谢,请采纳

这是说每升血液里有多少血细胞,L是升的意思 10^9是指10的9次方,即1后面9个0,1,000,000,000,十亿

结果是:3 10/3*9%10/2 =3*9%10/2 =27%10/2 =7/2 =3

3/8÷9/10 =3/8×10/9 =1/4×5/3 =15/12 =5/4

先把2,3,8,9,10,15加起来2+3+8+9+10+15=47,要组成三角形,且每边相等,必须公用3个数,且和能被3整除,依次猜想48,51,54,57,60,63,66,69,72,75,78,81,因为三个大数15+10+9=34,所以最大为47+34=81;然后看三个数的和能否组成1...

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