2.79十2.79x9用简便计算怎么写?

如题所述

2.79十2.79x9
=2.79x(1+9)
=2.79x10
=27.9追问

12.5x0.88用简便计算怎么写还用了什么定律

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第1个回答  2020-09-20
2.79+2.79×9
=2.79×(1+9)
=2.79×10
=27.9

2.79十2.79x9用简便计算怎么写?
2.79十2.79x9 =2.79x(1+9)=2.79x10 =27.9

27.9X0.9+2.79简便方法?
=2.79x(9+1)=2.79x10 =27.9

2.79-2.79×0.99的简便运算怎么算?
解:2.79-2.79×0.99等于( 279\/10000 ),【即等于0.0279】∵已知需求出2.79-2.79×0.99等于多少 A - A × B = A × (1 - B)∴2.79 - 2.79 × 0.99 = 2.79 × (1 - 0.99)= (2×100+79)\/100 × (100\/100 - 99\/100)= 279\/100 × 1\/100 = 279\/1000...

27.9x0.9-2.79怎样用简便计算?
=2.79x(9-1)=2.79x8 =22.32

27.9X9.9+2.79怎样算简便?
回答:2.79(9.9+1

2.73乘99的简便计算,请列式谢谢!
2.73×99的简便计算的过程是:2.73×99 =2.73×(100-1)=2.73×100-2.73×1 =273-2.73 =270.27 解题思路:因为被乘数是一个两位小数,乘数是99,与100差1,所以可以考虑用100的式子来替代99,达到简便运算的目的,此种方法就是乘法分配律的逆运算,比如999或者99都是可以这样用10的倍数...

(1.98+2.79)\/0.9可以简便计算吗?
(1.98+2.79)\/0.9 =1.98\/0.9+2.79\/0.9 =2.2+3.1 =5.3,7,(1.98+2.79)\/0.9 =1.98\/0.9+2.79\/0.9 =2.2+3.1 =5.3,2,

2.75 2.76 2.77 2.78 2.79等于什么乘什么等于什么
2.75+2.76+2.77+2.78+2.79=2.77×5=13.85

0.87×3.16+4.46怎么简便计算呢?
0.87×3.16+4.46的简便运算:=(0.9-0.03)*(3.1+0.06)+4.46 =0.9*3.1+0.9*0.06-0.03*3.1-0.03*0.06+4.46 =2.79+0.054-0.093-0.0018+4.46 =2.79+0.054+4.46-(0.093+0.0018)=7.304-0.0948 =7.2092 ...

中国十年期国债收益率
2022年02月,十年期国债收益率为2.79%;同比增长率为-14.96%,增速低于下文报表中的平均值-2.602%,增速承压。 【

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