![](https://rs.olm.vn/images/avt/0.png?1311)
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
2,52 x 10 = ……25,2………. 164,9 x 100 =…16490 2,5 x 1000 =2500
52,8 x 0,1 =……5,28……… 42,34 x 0,01= 0,4234 15,05 x 0,001= 0,01505
9,1 x 0,1=……0,91………. 3,7 x 0,01=……0,037… 7,9 x 0,001 = 0,0079
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
a x 0,1 = a : \(\dfrac{1}{10}\)
a : 0,01 = a x \(\dfrac{1}{100}\)
a x 1000 = a : 0,001
a : 1000 = a x \(\dfrac{1}{1000}\)
\(x\) : 0,2 = \(x\) x \(\dfrac{1}{5}\)
\(x\) : 0,25 = \(x\) x \(\dfrac{1}{4}\)
\(x\) : 0,125 = \(x\) x \(\dfrac{1}{8}\)
\(x\) : 0,5 = \(x\) x \(\dfrac{1}{2}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) \(2,23\cdot0,1+3,34:10+1:10\cdot4,43\)
\(=2,23\cdot0,1+3,34\cdot0,1+4,43\cdot0,1\)
\(=0,1\cdot\left(2,23+3,34+4,43\right)\)
\(=1\)
b) \(4,5:100+5,4\cdot0,01+1:100\cdot0,1\)
\(=4,5\cdot0,01+5,4\cdot0,01+0,1\cdot0,01\)
\(=0,01\left(4,5+5,4+0,1\right)\)
\(=0,1\)
![](https://rs.olm.vn/images/avt/0.png?1311)
42,5:0,1+36,5:0,01-42,65
=425+3650-42,65
=4075-42,65
=4032,35
![](https://rs.olm.vn/images/avt/0.png?1311)
25 : 0,1 = 250 42 : 0,01 = 4200 72 : 0,1 = 720
25 x 10 = 250 42 x 100 = 4200 83 : 0,01 = 8300
13 : 0,25 = 3,25 42 : 0,5 =84 75 : 0,5 = 150
13 x 4 = 52 42 x 2 = 84 125 : 0,25 = 500
X x 10+ X x 100-X x 10=61,5
X x (10+100-10) =61,5
X x 100 =61,5
X =61,5:100
X =0,615
cảm ơn bạn nha