4^2.3/8-10/7.14%+(-0,8)
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)
\(\frac{1.2+3.6+5.10+7.14}{2.3+6.9+10.15+14.21}\)
\(=\frac{1.2+3.6+5.10+7.14}{1.2.3+3.6.3+5.10.3+7.14.3}\)
\(=\frac{1.2+3.6+5.10+7.14}{3.\left(1.2+3.6+5.10+7.14\right)}\)
\(=\frac{1}{3}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(7.14+7.14+7.14\cdot8\)
\(=7.14\cdot\left(1+1+8\right)\)
\(=7.14\cdot10\)
\(=71.4\)
k hộ mk nhé!!!!
~ học tốt ~
\(7,14+7,14+7,14\)x \(8\)
\(=7,14X3X8\)
\(=21,42X8=171,36\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\dfrac{4}{5}\)+\(\dfrac{-5}{4}\)=\(\dfrac{0}{4}\)
\(\dfrac{-1}{3}\)+\(\dfrac{2}{5}-\dfrac{5}{6}\)=\(\dfrac{-10}{30}+\dfrac{12}{30}-\dfrac{25}{30}\)=\(\dfrac{-23}{30}\)
\(\dfrac{2}{3}-\dfrac{5}{7}.\dfrac{14}{25}\)=\(\dfrac{2}{3}-\dfrac{2}{5}\)=\(\dfrac{10}{15}-\dfrac{6}{15}\)=\(\dfrac{4}{15}\)
Mọi người giúp mình bài tìm x
1) (x-2/9)^3 = (8/27)^2
2)2.3^x -405 = 3^x-1
3)4/3 : 0,8 = 0,75x : (-1,5)
![](https://rs.olm.vn/images/avt/0.png?1311)
Mọi người giúp mình bài tìm x
1) (x-2/9)^3 = (8/27)^2
2)2.3^x -405 = 3^x-1
3)4/3 : 0,8 = 0,75x : (-1,5)
![](https://rs.olm.vn/images/avt/0.png?1311)
Mọi người giúp mình bài tìm x
1) (x-2/9)^3 = (8/27)^2
2)2.3^x -405 = 3^x-1
3)4/3 : 0,8 = 0,75x : (-1,5)
![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(4^2.\frac{3}{8}-\frac{10}{7}.14\%+\left(-0,8\right)\)
= \(16.\frac{3}{8}-\frac{10}{7}.\frac{14}{100}+\frac{-8}{10}\)
= \(2.\frac{3}{1}-\frac{10}{7}.\frac{7}{50}+\frac{-4}{5}\)
= \(6-\frac{1}{1}.\frac{1}{5}+\frac{-4}{5}\)
= \(\frac{30}{5}-\frac{1}{5}+\frac{-4}{5}\)
= \(\frac{29}{5}+\frac{-4}{5}\)
= \(\frac{25}{5}\) = \(5\)
chúc bạn học tốt nhé !