![](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)
a ) 18 x 10 = 180
18 x 100 = 1800
18 x 1000 = 18000
82 x 100 = 8200
75 x 1000 = 75000
19 x 10 = 190
256 x 1000 = 256000
302 x 10 = 3020
400 x 100 = 40000
b ) 9000 : 10 = 900
9000 : 100 = 90
9000 : 1000 = 9
6800 : 100 = 68
420 : 10 = 42
2000 : 1000 = 2
20020 : 10 = 2002
200200 : 100 = 2002
2002000 : 1000 = 2002
a)18 x 10 = 180
18 x 100 = 1 800
18 x 1000 = 18 000
82 x 100 = 8 200
75 x 1000 = 75 000
19 x 10 = 190
256 x 1000 = 256 000
302 x 10 = 3 020
400 x 100 = 40 000
b)9000 : 10 = 900
9000 : 100 = 90
9000 : 1000 = 9
6800 : 100 = 68
420 : 10 = 42
2000 : 1000 = 2
20 020 : 10 = 2 002
200 200 : 100 = 2 002
2 002 000 : 1000 = 2 002
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{1}{4}=\frac{25}{100}\) \(\frac{61}{100}>\frac{3}{5}\)
\(\frac{3}{4}< \frac{77}{100}\) \(\frac{13}{60}>\frac{1}{5}\)
\(\frac{12}{20}=\frac{39}{65}\) \(\frac{82}{91}< \frac{91}{82}\)
a) \(\frac{1}{4}=\frac{25}{100}\) b) Ta có: \(\frac{3}{5}=\frac{60}{100}< \frac{61}{100}\)nên \(\frac{61}{100}>\frac{3}{5}\)
c) Ta có:\(\frac{3}{4}=\frac{75}{100}< \frac{77}{100}\)nên \(\frac{3}{4}< \frac{77}{100}\) d) Ta có: \(\frac{1}{5}=\frac{12}{60}< \frac{13}{60}\)nên \(\frac{13}{60}>\frac{1}{5}\)
e) Ta có: \(\frac{12}{20}=\frac{3}{5}\)và \(\frac{39}{65}=\frac{3}{5}\)nên \(\frac{12}{20}=\frac{39}{65}\) f) Ta có: \(\frac{82}{91}< 1\)và \(\frac{91}{82}>1\)nên \(\frac{82}{91}< \frac{91}{82}\)
![](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)
\(x\times82=93600+x\times12\\ \Leftrightarrow x\times82-x\times12=93600\\ \Leftrightarrow x\left(82-12\right)=93600\\ \Leftrightarrow70x=93600\\ \Leftrightarrow x=93600:70=\dfrac{9360}{7}\)
Vậy \(x=\dfrac{9360}{7}\)
\(x\times82=93600+x\times12\\ \Rightarrow x\times82-x\times12=93600\\ x\times\left(82-12\right)=93600\\ x\times70=93600\\ x=\dfrac{93600}{70}\\ x=\dfrac{9360}{7}\)
Vậy x = \(\dfrac{9360}{7}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
7=4+3*1
10=4+3*2
....................
nho nhan chia truoc cong tru sau
![](https://rs.olm.vn/images/avt/0.png?1311)
\(82\times589-72\times589\)
\(\Rightarrow589\times\left(82-72\right)\)
\(\Rightarrow589\times10\)
\(\Rightarrow5890\)
Đáp án :
82 x 100 = 8 200
Hok tốt
82 x 100=8200