Bài 1: Tập hợp Q các số hữu tỉ
Các câu hỏi tương tự
\(\dfrac{4}{5}-\left(\dfrac{-2}{7}\right)-\dfrac{7}{10}\)
\(\left(6-\dfrac{2}{3}+\dfrac{1}{2}\right)-\left(5+\dfrac{5}{3}-\dfrac{3}{2}\right)-\left(3-\dfrac{7}{3}+\dfrac{5}{2}\right)\)
a) 12,5.left(-dfrac{5}{7}right)+1,5.left(-dfrac{5}{7}right)
b) left(-dfrac{2}{5}-dfrac{3}{7}right):dfrac{4}{5}+left(-dfrac{1}{5}+dfrac{3}{7}right);dfrac{4}{5}
c) 12.left(-dfrac{2}{3}right)^2+dfrac{4}{3}
d) 1:left(dfrac{2}{3}-dfrac{3}{4}right)^2
e) 15.left(-dfrac{2}{3}right)^{^{ }2}-dfrac{7}{3}
f) dfrac{5^4.20^4}{25^5.4^5}
Đọc tiếp
a) 12,5.\(\left(-\dfrac{5}{7}\right)+1,5.\left(-\dfrac{5}{7}\right)\)
b) \(\left(-\dfrac{2}{5}-\dfrac{3}{7}\right):\dfrac{4}{5}+\left(-\dfrac{1}{5}+\dfrac{3}{7}\right);\dfrac{4}{5}\)
c) \(12.\left(-\dfrac{2}{3}\right)^2+\dfrac{4}{3}\)
d) \(1:\left(\dfrac{2}{3}-\dfrac{3}{4}\right)^2\)
e) \(15.\left(-\dfrac{2}{3}\right)^{^{ }2}-\dfrac{7}{3}\)
f) \(\dfrac{5^4.20^4}{25^5.4^5}\)
11) dfrac{1}{3}x + dfrac{1}{5} - dfrac{1}{2}x 1dfrac{1}{4}
12) dfrac{3}{2}( x + dfrac{1}{2}) - dfrac{1}{8}x dfrac{1}{4}
13) dfrac{3}{5}( x + dfrac{1}{3}) - dfrac{1}{3}( x - dfrac{1}{2}) 1dfrac{1}{3}
14) dfrac{2}{5}( x + dfrac{1}{2}) dfrac{3}{4}( x - dfrac{1}{5})
Giup mik nha mik cần gấp
Đọc tiếp
11) \(\dfrac{1}{3}\)x + \(\dfrac{1}{5}\) - \(\dfrac{1}{2}\)x = 1\(\dfrac{1}{4}\)
12) \(\dfrac{3}{2}\)( x + \(\dfrac{1}{2}\)) - \(\dfrac{1}{8}\)x = \(\dfrac{1}{4}\)
13) \(\dfrac{3}{5}\)( x + \(\dfrac{1}{3}\)) - \(\dfrac{1}{3}\)( x - \(\dfrac{1}{2}\)) = 1\(\dfrac{1}{3}\)
14) \(\dfrac{2}{5}\)( x + \(\dfrac{1}{2}\)) = \(\dfrac{3}{4}\)( x - \(\dfrac{1}{5}\))
Giup mik nha mik cần gấp
So sánh
a ) dfrac{7}{15}text{và}dfrac{10}{21}
b ) dfrac{-3}{200}text{và}dfrac{1}{9999}
c)dfrac{21}{37}text{và}dfrac{199}{188}
d)dfrac{-34}{57}text{và}dfrac{-343434}{575757}
e)-3dfrac{3}{5}text{và}dfrac{-16}{5}
g) dfrac{-19}{59}text{và}dfrac{2009}{-2008}
h)0,75text{và}dfrac{-3}{4}
i ) dfrac{5}{4}text{và}dfrac{2009}{2008}
Đọc tiếp
So sánh
a ) \(\dfrac{7}{15}\text{và}\dfrac{10}{21}\)
b ) \(\dfrac{-3}{200}\text{và}\dfrac{1}{9999}\)
c)\(\dfrac{21}{37}\text{và}\dfrac{199}{188}\)
d)\(\dfrac{-34}{57}\text{và}\dfrac{-343434}{575757}\)
e)\(-3\dfrac{3}{5}\text{và}\dfrac{-16}{5}\)
g) \(\dfrac{-19}{59}\text{và}\dfrac{2009}{-2008}\)
h)\(0,75\text{và}\dfrac{-3}{4}\)
i ) \(\dfrac{5}{4}\text{và}\dfrac{2009}{2008}\)
Thực hiện phép tính:
a) left(dfrac{9}{25}-2.18right):left(3dfrac{4}{5}+0,2right)
b) dfrac{3}{8}.19dfrac{1}{3}-dfrac{3}{8}.33dfrac{1}{3}
c) 1dfrac{4}{23}+dfrac{5}{21}-dfrac{4}{23}+0,5+dfrac{16}{21}
d) dfrac{21}{47}+dfrac{9}{45}+dfrac{26}{47}+dfrac{4}{5}
e) dfrac{15}{12}+dfrac{5}{13}-dfrac{3}{12}-dfrac{18}{13}
Đọc tiếp
Thực hiện phép tính:
a) \(\left(\dfrac{9}{25}-2.18\right):\left(3\dfrac{4}{5}+0,2\right)\)
b) \(\dfrac{3}{8}.19\dfrac{1}{3}-\dfrac{3}{8}.33\dfrac{1}{3}\)
c) \(1\dfrac{4}{23}+\dfrac{5}{21}-\dfrac{4}{23}+0,5+\dfrac{16}{21}\)
d) \(\dfrac{21}{47}+\dfrac{9}{45}+\dfrac{26}{47}+\dfrac{4}{5}\)
e) \(\dfrac{15}{12}+\dfrac{5}{13}-\dfrac{3}{12}-\dfrac{18}{13}\)
So sánh các số hữu tỉ:
a) \(x=\dfrac{2}{-7}\) và \(y=\dfrac{-3}{11}\) ; b) \(x=\dfrac{-213}{300}\) và \(y=\dfrac{18}{-25}\);
c) \(x=-0,75\) và \(y=\dfrac{-3}{4}\).
Tính nhanh:
\(\left(\dfrac{-3}{7}+\dfrac{4}{11}\right):\dfrac{7}{11}+\left(\dfrac{-4}{7}+\dfrac{7}{11}\right):\dfrac{7}{11}\)
Các bn giúp mk vs nha
Tìm x biết:
a) \(\dfrac{x+1}{10}+\dfrac{x+1}{11}+\dfrac{x+1}{12}=\dfrac{x+1}{13}+\dfrac{x+1}{14}\)
b)\(\dfrac{x+4}{2010}+\dfrac{x+3}{2010}=\dfrac{x+2}{2012}+\dfrac{x+1}{2013}\)
\(\dfrac{-2}{3}x+\dfrac{-3}{7}+\dfrac{1}{2}x=\dfrac{-5}{6}\)
tìm x biết