Đại số lớp 6
Các câu hỏi tương tự
BT3: Tìm x, biết:
7) \(\dfrac{-5}{17}+\dfrac{3}{17}\le\dfrac{x}{17}\le\dfrac{13}{17}+\dfrac{-11}{17}\)
8) \(\dfrac{2}{3}\left(\dfrac{1}{2}+\dfrac{3}{4}-\dfrac{1}{3}\right)\le\dfrac{x}{18}\le\dfrac{7}{3}\left(\dfrac{1}{2}-\dfrac{1}{6}\right)\)
bài 1 : tính
a,dfrac{-6}{11}: (dfrac{3}{5}.dfrac{4}{11})
b, dfrac{7}{12} + dfrac{5}{12} : 6 - dfrac{11}{36}
c, ( dfrac{4}{5} +dfrac{1}{2} ) : ( dfrac{3}{13}-dfrac{8}{13})
d, ( dfrac{2}{3} -dfrac{1}{4} +dfrac{5}{11} ) : ( dfrac{8}{12} +1 - dfrac{7}{11} )
bài 2 , tìm x, biết
a, dfrac{-2}{5}. x +dfrac{4}{3} dfrac{7}{3}
b,dfrac{9}{8}+dfrac{3}{8}-x 0,125
c,dfrac{3}{4}: x dfrac{-7}{12}
d,dfrac{3}{8}-dfrac{1}{6}- x dfrac{1}{4}
e, dfrac{1}{3}+dfrac{1}{2}: x -4
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bài 1 : tính
a,\(\dfrac{-6}{11}\): (\(\dfrac{3}{5}.\)\(\dfrac{4}{11}\))
b, \(\dfrac{7}{12}\) + \(\dfrac{5}{12}\) : 6 - \(\dfrac{11}{36}\)
c, ( \(\dfrac{4}{5}\) +\(\dfrac{1}{2}\) ) : ( \(\dfrac{3}{13}\)-\(\dfrac{8}{13}\))
d, ( \(\dfrac{2}{3}\) -\(\dfrac{1}{4}\) +\(\dfrac{5}{11}\) ) : ( \(\dfrac{8}{12}\) +1 - \(\dfrac{7}{11}\) )
bài 2 , tìm x, biết
a, \(\dfrac{-2}{5}\). x +\(\dfrac{4}{3}\) = \(\dfrac{7}{3}\)
b,\(\dfrac{9}{8}\)+\(\dfrac{3}{8}\)-x = 0,125
c,\(\dfrac{3}{4}\): x =\(\dfrac{-7}{12}\)
d,\(\dfrac{3}{8}\)-\(\dfrac{1}{6}\)- x = \(\dfrac{1}{4}\)
e, \(\dfrac{1}{3}\)+\(\dfrac{1}{2}\): x = -4
tim x , biet :
b, |dfrac{5}{4}x-dfrac{7}{2}||dfrac{5}{8}x+dfrac{3}{5}|0
c, |dfrac{7}{5}x+dfrac{2}{3}||dfrac{4}{3}x-dfrac{1}{4}|
d, |dfrac{7}{8}x+dfrac{5}{6}|-|dfrac{1}{2}x+5|0
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tim x , biet :
b, |\(\dfrac{5}{4}\)x-\(\dfrac{7}{2}\)|=|\(\dfrac{5}{8}\)x+\(\dfrac{3}{5}\)|=0
c, |\(\dfrac{7}{5}\)x+\(\dfrac{2}{3}\)|=|\(\dfrac{4}{3}\)x-\(\dfrac{1}{4}\)|
d, |\(\dfrac{7}{8}\)x+\(\dfrac{5}{6}\)|-|\(\dfrac{1}{2}\)x+5|=0
Bài 1 : Tìm GTNN
A left(x-dfrac{1}{4}right)^2+left|y+dfrac{1}{4}right|+dfrac{13}{14}
Bài 2 : Tìm x , y là số nguyên
a) dfrac{x+3}{5}-dfrac{1}{y-1}dfrac{2}{5}
b) -1-dfrac{7}{14}ledfrac{x}{3}le1+dfrac{12}{48}
c) dfrac{2y+7}{y-2}in Z
giúp mk với sáng mai mk có tiết toán
Đọc tiếp
Bài 1 : Tìm GTNN
A = \(\left(x-\dfrac{1}{4}\right)^2+\left|y+\dfrac{1}{4}\right|+\dfrac{13}{14}\)
Bài 2 : Tìm x , y là số nguyên
a) \(\dfrac{x+3}{5}-\dfrac{1}{y-1}=\dfrac{2}{5}\)
b) \(-1-\dfrac{7}{14}\le\dfrac{x}{3}\le1+\dfrac{12}{48}\)
c) \(\dfrac{2y+7}{y-2}\in Z\)
giúp mk với 
sáng mai mk có tiết toán
1. Tim x:
a. dfrac{x}{5} dfrac{5}{6} + dfrac{-19}{30}
b. dfrac{-5}{6} -x dfrac{7}{12}- dfrac{1}{3}times x
c.2016^{^{ }3} times2016^{^{ }x} 2016^{^{ }8}
d. (x+dfrac{3}{4}):dfrac{5}{2}3^1_2
e. (2,8 x - 2^5) : dfrac{2}{3}3^2
f. dfrac{4}{7}times x-dfrac{2}{3}dfrac{2}{5}
g. (dfrac{3x}{7}+1):left(-4right)dfrac{-1}{28}
2. Thuc hien phep tinh:
a. dfrac{1}{2}+dfrac{1}{2}timesdfrac{2}{3}-dfrac{1}{3}:dfrac{3}{4}+1^4_5
b. dfrac{7times5^2-7^2}{7times24+21}
c. dfrac{2}{3}+dfrac{1}{3}times(-dfr...
Đọc tiếp
1. Tim x:
a. \(\dfrac{x}{5}\) = \(\dfrac{5}{6}\) + \(\dfrac{-19}{30}\)
b. \(\dfrac{-5}{6}\) \(-x\) = \(\dfrac{7}{12}\)\(-\) \(\dfrac{1}{3}\)\(\times\) \(x\)
c.2016\(^{^{ }3}\) \(\times\)2016\(^{^{ }x}\) = 2016\(^{^{ }8}\)
d. \((x+\dfrac{3}{4}):\dfrac{5}{2}=3^1_2\)
e. (2,8 \(x\) \(-\) 2\(^5\)) : \(\dfrac{2}{3}=3^2\)
f. \(\dfrac{4}{7}\times x-\dfrac{2}{3}=\dfrac{2}{5}\)
g. \((\dfrac{3x}{7}+1):\left(-4\right)=\dfrac{-1}{28}\)
2. Thuc hien phep tinh:
a. \(\dfrac{1}{2}+\dfrac{1}{2}\times\dfrac{2}{3}-\dfrac{1}{3}:\dfrac{3}{4}+1^4_5\)
b. \(\dfrac{7\times5^2-7^2}{7\times24+21}\)
c. \(\dfrac{2}{3}+\dfrac{1}{3}\times(-\dfrac{4}{9}+\dfrac{5}{6}):\dfrac{7}{12}\)
1. Tính ( hợp lí nếu có thể )
a) dfrac{5}{11}+dfrac{23}{29}+dfrac{17}{11} d)dfrac{-21}{10}+dfrac{21}{10}timesdfrac{3}{4}-dfrac{3}{4}
b) dfrac{17}{5}left(5+dfrac{2}{7}right)+dfrac{47}{7}xdfrac{17}{5} e) 2-1,6:left(1+dfrac{2}{3}right)+4%
c)10dfrac{3}{7}-left(2dfrac{1}{8}+4dfrac{3}{7}right)
2. Tìm x, biết:
a)dfrac{2}{3}+x-45% d)3-/x-dfrac{1}{2}/dfrac{1}{2}(/../giá trị tuyệt đối...)
b)x+dfrac{2}{3}x-dfrac{4}{5}x2dfrac{1}{2} e)dfrac{15}{x}-dfrac{1}{3}dfrac{28}{51}
c)45:left(3x-4right)3^2
3.Mộ...
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1. Tính ( hợp lí nếu có thể )
a) \(\dfrac{5}{11}+\dfrac{23}{29}+\dfrac{17}{11}\) d)\(\dfrac{-21}{10}+\dfrac{21}{10}\times\dfrac{3}{4}-\dfrac{3}{4}\)
b) \(\dfrac{17}{5}\left(5+\dfrac{2}{7}\right)+\dfrac{47}{7}\)x\(\dfrac{17}{5}\) e) \(2-1,6:\left(1+\dfrac{2}{3}\right)+4\%\)
c)\(10\dfrac{3}{7}-\left(2\dfrac{1}{8}+4\dfrac{3}{7}\right)\)
2. Tìm x, biết:
a)\(\dfrac{2}{3}+x=-45\%\) d)\(3\)-/x-\(\dfrac{1}{2}\)/=\(\dfrac{1}{2}\)(/../giá trị tuyệt đối...)
b)\(x+\dfrac{2}{3}x-\dfrac{4}{5}x=2\dfrac{1}{2}\) e)\(\dfrac{15}{x}-\dfrac{1}{3}=\dfrac{28}{51}\)
c)\(45:\left(3x-4\right)=3^2\)
3.Một khu cườn hình chữ nhật có chiều dài 60 m. Chiều rộng bằng \(\dfrac{3}{4}\) chiều dài
a) Tính diện tích đám đất
b) Người ta để \(\dfrac{7}{9}\) diện tích đám đất trồng cây ăn quả. 30% diện tích còn lại đào ao thả cá. Tính diện tích đào ao thả cá
4. Trên nữa mặt phẳng bờ chứa tia Ox và hai tia Oy và Oz sao cho góc xOy=100o, xOz=20o.
a)Tính góc yOz
b)Vẽ Om là tia phân giác yOz. Tính xOm
tìm x biết
a)11(x-6)=4x+11
b)4\(\dfrac{1}{3}\)(\(\dfrac{1}{6}\)-\(\dfrac{1}{2}\))\(\le\)x\(\le\)\(\dfrac{2}{3}\)(\(\dfrac{1}{2}\)-\(\dfrac{1}{3}\)-\(\dfrac{3}{4}\))với x\(\in\)z
Các bn ơi giúp mk vs nha mấy bn!!
Câu 1: Tìm x, biết
a, x dfrac{1}{4} + dfrac{2}{13}
b, dfrac{x}{3} dfrac{2}{3} + dfrac{-1}{7} +
Câu 3: Tính nhanh:
a, dfrac{-2}{5} +dfrac{3}{-4} + dfrac{6}{7} + dfrac{3}{4} + dfrac{2}{5}
b, dfrac{7}{15} + dfrac{4}{-9} + dfrac{-2}{11} + dfrac{8}{15} + dfrac{-5}{9}
c, dfrac{-5}{7} + dfrac{5}{13} +dfrac{-20}{41} + dfrac{8}{13} + dfrac{-21}{41}
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Các bn ơi giúp mk vs nha mấy bn!!
Câu 1: Tìm x, biết
a, x = \(\dfrac{1}{4}\) + \(\dfrac{2}{13}\)
b, \(\dfrac{x}{3}\) = \(\dfrac{2}{3}\) + \(\dfrac{-1}{7}\) +
Câu 3: Tính nhanh:
a, \(\dfrac{-2}{5}\) +\(\dfrac{3}{-4}\) + \(\dfrac{6}{7}\) + \(\dfrac{3}{4}\) + \(\dfrac{2}{5}\)
b, \(\dfrac{7}{15}\) + \(\dfrac{4}{-9}\) + \(\dfrac{-2}{11}\) + \(\dfrac{8}{15}\) + \(\dfrac{-5}{9}\)
c, \(\dfrac{-5}{7}\) + \(\dfrac{5}{13}\) +\(\dfrac{-20}{41}\) + \(\dfrac{8}{13}\) + \(\dfrac{-21}{41}\)
bài 1: tìm x bt:
a\(\dfrac{2}{3}x-\dfrac{1}{2}=\dfrac{1}{10}\)
b, \(5\dfrac{4}{7}:x=13\)
c, (2 và 4/5.x-50) :2/3= 51
d,\(\left(x+\dfrac{1}{2}\right).\left(\dfrac{2}{3}-2x\right)=0\)
e, \(\dfrac{2}{3}-\dfrac{1}{2}x=\dfrac{5}{12}\)
giúp mk nhs!!!!!!!!!!