早教吧作业答案频道 -->其他-->
怎样算简便就怎样算.25×137×404200-1934-1066290×54+29×46046×102+308.
题目详情
怎样算简便就怎样算.
25×137×40
4200-1934-1066
290×54+29×460
46×102+308.
25×137×40
4200-1934-1066
290×54+29×460
46×102+308.
▼优质解答
答案和解析
(1)25×137×40,
=25×40×137,
=1000×137,
=137000;
(2)4200-1934-1066,
=4200-(1934+1066),
=4200-3000,
=1200;
(3)290×54+29×460,
=290×54+290×46,
=290×(54+46),
=290×100,
=29000;
(4)46×102+308,
=46×(100+2)+308,
=46×100+46×2+308,
=4600+92+308,
=4600+(92+308),
=4600+400,
=5000.
=25×40×137,
=1000×137,
=137000;
(2)4200-1934-1066,
=4200-(1934+1066),
=4200-3000,
=1200;
(3)290×54+29×460,
=290×54+290×46,
=290×(54+46),
=290×100,
=29000;
(4)46×102+308,
=46×(100+2)+308,
=46×100+46×2+308,
=4600+92+308,
=4600+(92+308),
=4600+400,
=5000.
看了 怎样算简便就怎样算.25×1...的网友还看了以下:
求1-1/2sin^2(x/2)的导数.我是这样算的:Y=-1/2*(sinx/2*sinx/2) 2020-06-10 …
请问1/log2m+1/log5m=2推出1/logm^2+1/logm^5=2为什么可以这样推? 2020-06-25 …
怎样简便就怎样计算3/5÷1/20÷3/43/5÷(4-13/19-6/19)2/5×2/1怎样简 2020-07-09 …
怎样简便就怎样计算.1/7+5.4+6/79+1/4-(1/4+5/6)5/6+4/5-11/15 2020-07-18 …
设非空集合A{1,2,3,4,5,6,7},且当a∈A时必有8-a∈A,这样的A共有(15)个.{ 2020-08-01 …
总体X~N(2,4),X1,X2,…,Xn为来自X的样本,.X为样本均值,则()A.1n−1ni= 2020-08-03 …
多对相对性状的表现型(3:1)^n怎样解,还有基因型(1:2:1)^n怎样解就是(3:1)^2怎样展 2020-11-02 …
函数f:{1,2,3}——{1,2,3}满足f[f(x)]=f(x),则这样的函数共有()它的解析是 2020-11-19 …
设非空集合A{1,2,3,4,5,6,7},且当a∈A时必有8-a∈A,这样的A共有(15)个.{4 2020-12-07 …
已知a+b=2,ab=2,求1/2a^3b+a^2b^2+1/2ab^3的值!我是这样算的,ab(1 2020-12-31 …