www.fltk.net > 10.1x5.2%0.52怎么简便运算

10.1x5.2%0.52怎么简便运算

原式=101×0.52-0.52×1 =0.52×(101-1) =0.52×100 =52

5.2×10.1简便计算过程是: 5.2×10.1 =5.2×(10+0.1) =5.2×10+5.2×0.1 =52+0.52 =52.52 解题分析:被乘数进行拆分无法使乘法简便,所以来分析乘数,因为乘数是可以拆成10和0.1的这两个数,而且这两个数与别的数相乘是十倍与0.1倍的关系,所以计...

=5.2×10.1-5.2×0.1 =5.2(10-1-0.1) =5.2×10 =52

10.1x5.2一0.52 =10.1x5.2一0.1x5.2 =(10.1一0.1)x5.2 =10x5.2 =52 简便运算的思路是: (1)运用运算的性质、定律等,本例采取结合律。 (2)拆数或转化时,数的大小不能改变,本例对0.52拆转成0.1x5.2。

5.2×10.1简便计算 =5.2x(10+0.1) =5.2x10+5.2x0.1 =52+0.52 =52.52

5.2×10.1 =5.2×10+5.2×0.1 =52+0.52 =52.52

1/10+3/8-2/5 =3/8-(2/5-1/10) =3/8-(4/10-1/10) =3/8-3/10 =30/80-24/80 =6/80 =3/40

1、题目有误,分子与分母颠倒了,倒数第二个乘式中应为减号 原式=(3/2)*(5/4)*(7/6)*(9/8)*(11/10)*(2/3)*(4/5)*(6/7)*(8/9)=11/10 约分后等于10分之11 2、由题意知,二毛的速度是小毛的1.25倍,大毛是小毛的1.5倍,设小毛跑...

=5.2×(10+0.1) =5.2×10+5.2×0.1 =52+0.52 =52.52

这是浮点运算产生的误 差 http://support.microsoft.com/kb/78113/zh-cn 公式可以改成 =ROUND(IF(ROUND(MOD(AVERAGE(A1,A2)*10,1),6)=0.5,EVEN(TRUNC(AVERAGE(A1,A2)*10))/10,AVERAGE(A1,A2)),1)

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