1997+2,5 x 12,5 x0,4x0,08 +0,8003/1,25 x2,5 x8 x4
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)
e)\(\frac{0,1997+2,5\cdot12,5\cdot0,4\cdot0,08+8,003}{1,25\cdot2,5\cdot8\cdot4}=\frac{0,1997+1+8,003}{100}=\frac{2}{100}=\frac{1}{50}\)
g)\(\frac{\left(10,6524+0,3476\right)\cdot125\cdot0,4+8}{4\cdot0,1\cdot8\cdot0,25\cdot125}=\frac{11\cdot125\cdot0,4+8}{100}=\frac{558}{100}=5,58\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,x +18,7=65,5:2,5\)
\(\Leftrightarrow x+18,7=26,2\)
\(\Leftrightarrow x=26,2-18,7\)
\(\Leftrightarrow x=7,5\)
Vậy \(x=7,5\).
\(b,6,3.x=83,65-20,02\)
\(\Leftrightarrow6,3.x=63,63\)
\(\Leftrightarrow x=63,63:6,3\)
\(\Leftrightarrow x=10,1\)
Vậy \(x=10,1\).
![](https://rs.olm.vn/images/avt/0.png?1311)
a) 725,16 x 1,25 x 0,4 x 8 x 2,5
= 725,16 x ( 1,25 x 8 ) x ( 0,4 x 2,5 )
= 725,16 x 10 x 1
= 7251,6
b) 937,6 x 98 + 937,6 + ( 907+30,6 )
= 937,6 x 98 + 937,6 + 937,6
= 937,6 x 98 + 937,6 x 2
= 937,6 x ( 98 + 2 )
= 937,6 x 100
= 93760
a)725,16*1,25*0,4*8*2,5=725,16*(1,25*8)*(0,4*2,5)=725,16*10*1=7251,6
b)937,6*98+937,6+(907+30,6)=937,6*98+937,6*1+937,6*1=937,6*(98+1+1)=937,6*10=9376
![](https://rs.olm.vn/images/avt/0.png?1311)
a, \(\left(x-158\right):6=20\)
\(x-158=20.6\)
\(x-158=120\)
\(x=120+158\)
\(x=278\)
~~~Hok tốt~~~
a) \(\left(x-158\right):6=20\)
\(\Leftrightarrow x-158=\frac{20}{6}=\frac{10}{3}\)
\(\Leftrightarrow x=\frac{10}{3}+158\)
\(\Leftrightarrow x=\frac{484}{3}\)
Vậy : \(x=\frac{484}{3}\)
b) \(x-1,25.4=2,5\)
\(\Leftrightarrow x-5=2,5\)
\(\Leftrightarrow x=2,5+5\)
\(\Leftrightarrow x=7,5\)
Vậy : \(x=7,5\)
c) \(x+0,25=\frac{43}{4}-\frac{18}{5}\)
\(\Leftrightarrow x+\frac{1}{4}=\frac{143}{20}\)
\(\Leftrightarrow x=\frac{143}{20}-\frac{1}{4}\)
\(\Leftrightarrow x=\frac{69}{10}\)
Vậy : \(x=\frac{69}{10}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{0,8\times0,4\times1,25\times2,5\times31,8+68,2}{0,1\times12,5\times4\times2,5\times2\times8\times0,2\times5}\)
\(=\frac{\left(0,8\times1,25\right)\times\left(0,4\times2,5\right)\times31,8+68,2}{0,1\times\left(12,5\times8\right)\times\left(4\times2,5\right)\times2\times\left(0,2\times5\right)}\)
\(=\frac{1\times1\times31,8+68,2}{0,1\times100\times10\times2\times1}\)
\(=\frac{31,8+68,2}{0,1\times100\times10\times2\times1}=\frac{100}{200}=\frac{1}{2}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
B) 1,25X 0,25 X4 X8
=( 1,25 X 8 ) X (0,25 X 8 )
= 10 X 1
= 10
C)12,5 x 0,8 x 10
=(12,5 x 0,8)x10
= 100 x 10
=1000
D) 0,025 x 10 x 4
= (0,025x 10)x4
= 0,25 x 4
= 1
CHÚC BN HỌC TỐT !