Chương I : Số hữu tỉ. Số thực
Các câu hỏi tương tự
a. \(-4\dfrac{3}{5}\times2\dfrac{4}{23}\le x\le-2\dfrac{3}{5}\times1\dfrac{6}{15}\)
a) 2/3 -4 . (1/2 +3/4)
b) (-1/3 + 5/6) .11 7
c) -5/11 . 7/15 . 11/-5 . (-30)
d) -1/6 . -15/19 . 38/45
e) -5/9 . 3/11 + ( -13/18 . 3/11)
f) ( 2 2/15 . 9/17 . 3/32) : -3/17
a) 2/3 -4 . (1/2 +3/4)
b) (-1/3 + 5/6) .11 -7
c) -5/11 . 7/15 . 11/-5 . (-30)
d) -1/6 . -15/19 . 38/45
e) -5/9 . 3/11 + ( -13/18 . 3/11)
f) ( 2 2/15 . 9/17 . 3/32) : -3/17
Tìm x :
a)\(\dfrac{x-1}{50}+\dfrac{x-2}{49}=\dfrac{x-3}{48}+\dfrac{x-4}{47}\)
b)\(\dfrac{x+25}{6}+\dfrac{x+20}{11}+\dfrac{x+16}{15}+3=0\)
c)\(\dfrac{x-15}{6}+\dfrac{x-10}{11}=\dfrac{x-3}{18}+\dfrac{x-7}{14}\)
Tính giá trị biểu thức :
A=\(\left[\dfrac{1\dfrac{11}{31}.4\dfrac{3}{7}-\left(15-6\dfrac{1}{3}.\dfrac{2}{19}\right)}{4\dfrac{5}{6}+\dfrac{1}{6}\left(12-5\dfrac{1}{3}\right)}\right].\dfrac{31}{50}\)
1,dfrac{3}{16}- ( x - dfrac{5}{4} ) - ( dfrac{3}{4} + dfrac{-7}{8} - 1 ) 2dfrac{1}{2}2,dfrac{1}{2} . ( dfrac{1}{6} - dfrac{9}{10} ) dfrac{1}{5} - x + ( dfrac{1}{15} - dfrac{-1}{5} )Giúp mik nhanh với ạ
Đọc tiếp
1,\(\dfrac{3}{16}\)- ( x - \(\dfrac{5}{4}\) ) - ( \(\dfrac{3}{4}\) + \(\dfrac{-7}{8}\) - 1 ) = \(2\dfrac{1}{2}\)
2,\(\dfrac{1}{2}\) . ( \(\dfrac{1}{6}\) - \(\dfrac{9}{10}\) ) = \(\dfrac{1}{5}\) - x + ( \(\dfrac{1}{15}\) - \(\dfrac{-1}{5}\) )
Giúp mik nhanh với ạ
Tính bằng cách hợp lí :
A=\(\dfrac{5}{9}:\left(\dfrac{1}{11}-\dfrac{5}{2}\right)+\dfrac{5}{9}:\left(\dfrac{1}{15}-\dfrac{2}{3}\right)\)
B=\(\left(6-\dfrac{2}{3}+\dfrac{1}{2}\right)-\left(5+\dfrac{5}{3}-\dfrac{3}{2}\right)-\left(3-\dfrac{7}{3}+\dfrac{5}{2}\right)\)
a \(\dfrac{3}{5}:\left(\dfrac{-1}{15}-\dfrac{1}{6}\right)+\dfrac{3}{5}:\left(\dfrac{-1}{3}-1\dfrac{1}{15}\right)\)
b\(\left\{\left[6,2:0,31-\dfrac{5}{6}.0,9.0,2+0,15\right]:0,2\right\}\left[\left(2+1\dfrac{4}{11}.0,22:0,1\right):\dfrac{1}{33}\right]\)
mong mọi người giúp đỡ
a, left(18dfrac{1}{3}:sqrt{225}+8dfrac{2}{3}.sqrt{dfrac{49}{4}}right): left[left(12dfrac{1}{3}+8dfrac{6}{7}right)-dfrac{left(sqrt{7}right)^2}{left(3sqrt{2}right)^2}right]: dfrac{1704}{445}b, dfrac{1}{1.2}+dfrac{1}{2.3}+...+dfrac{1}{99.100}c, left(1-dfrac{1}{2}right)xleft(1-dfrac{1}{3}right)x.....xleft(1-dfrac{1}{n+1}right) (n ϵ N)d, -66 x left(dfrac{1}{2}-dfrac{1}{3}+dfrac{1}{11}right) + 124 x -37 + 63 x -124e, dfrac{7}{4} x left(dfrac{33}{12}+dfrac{3333}{2020}+dfrac{333333}{303030}+dfrac{33333...
Đọc tiếp
a, \(\left(18\dfrac{1}{3}:\sqrt{225}+8\dfrac{2}{3}.\sqrt{\dfrac{49}{4}}\right)\): \(\left[\left(12\dfrac{1}{3}+8\dfrac{6}{7}\right)-\dfrac{\left(\sqrt{7}\right)^2}{\left(3\sqrt{2}\right)^2}\right]\): \(\dfrac{1704}{445}\)
b, \(\dfrac{1}{1.2}\)+\(\dfrac{1}{2.3}\)+...+\(\dfrac{1}{99.100}\)
c, \(\left(1-\dfrac{1}{2}\right)\)x\(\left(1-\dfrac{1}{3}\right)\)x.....x\(\left(1-\dfrac{1}{n+1}\right)\) (n ϵ N)
d, -66 x \(\left(\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{11}\right)\) + 124 x -37 + 63 x -124
e, \(\dfrac{7}{4}\) x \(\left(\dfrac{33}{12}+\dfrac{3333}{2020}+\dfrac{333333}{303030}+\dfrac{33333333}{42424242}\right)\)