Bài 2: Cộng, trừ số hữu tỉ
Các câu hỏi tương tự
1.Tìm x, biết:
a) 7/8 + x 4/7 b) 6 – x (-3)/4 c) 1/(-5) + x 3/4 d) –6 – x (-3)/5
e) - 2/6 + x 5/7 f) -8 – x (-5)/3 g) - 2/10 – x - 9/8 h) 8 – x (-1)/6
i) - 2/5 + x 5/7 j) -2 – x (-5)/3 k) - 1/6 – x - 9/8 l) 8 – x (-1)/5
2. Tính:
a) -7/3 + 4/9 b) -8/18 - 15/56 c) (-7) - (-3/4) d) 0,15 + (-5/12)
e) -1/42 + -1/28 f) -1/21 + -1/36 g) 5,5 - (-2/7) h) 0,9 - (-4...
Đọc tiếp
1.Tìm x, biết:
a) 7/8 + x = 4/7 b) 6 – x = (-3)/4 c) 1/(-5) + x = 3/4 d) –6 – x = (-3)/5
e) - 2/6 + x = 5/7 f) -8 – x = (-5)/3 g) - 2/10 – x = - 9/8 h) 8 – x = (-1)/6
i) - 2/5 + x = 5/7 j) -2 – x = (-5)/3 k) - 1/6 – x = - 9/8 l) 8 – x = (-1)/5
2. Tính:
a) -7/3 + 4/9 b) -8/18 - 15/56 c) (-7) - (-3/4) d) 0,15 + (-5/12)
e) -1/42 + -1/28 f) -1/21 + -1/36 g) 5,5 - (-2/7) h) 0,9 - (-4/7)
tìm x , biết
a) 17/6- x( x-7/6)= 7/4
b) 3/35 - ( 3/5-x)= 2/7
tìm x thuộc Z , biết
3/4-5/6 < x/12 < 1 -( 2/3-1/4)
tìm x biết
a ) 2x-3=x + 1/2
b) 4x- ( x+ 1/2) = 2x - ( 1/2 - 5 )
a, (x+2018)(1/2+2/7)=(x+2018).(1/5+1/6)
b, 7(x-1)+2x(x-1)=0
a)2x.(x-\(\dfrac{1}{7}\) ) =0
b) \(\dfrac{3}{4}+\dfrac{1}{4}:x=\dfrac{2}{5}\)
c) \(4\dfrac{5}{9}:2\dfrac{5}{18}-7< x< \left(3\dfrac{1}{5}:3,2+4,5.1\dfrac{31}{45}\right)\)
29 tháng 6 2021 lúc 13:21
h) \(\dfrac{x}{2}-\dfrac{1}{x}=\dfrac{1}{12}\)
i) \(x^2-\dfrac{7}{6}x+\dfrac{1}{3}=0\)
k) \(\dfrac{13}{x-1}+\dfrac{5}{2x-2}-\dfrac{6}{3x-3}\)
Bài 7 :
a. x - 2/35 = -2/25 . b.11/12 - ( x + 2/5 ) = 2/3 .
c. 2/5 + 1/4 . x = -3/10 .
29 tháng 6 2021 lúc 12:58
g) 3-dfrac{2}{2x-3}dfrac{2}{5}dfrac{2}{9-6x}-dfrac{3}{2}h) dfrac{x}{2}-dfrac{1}{x}dfrac{1}{12}i) x^2-dfrac{7}{6}x+dfrac{1}{3}0k) dfrac{13}{x-1}+dfrac{5}{2x-2}-dfrac{6}{3x-3}m) left(dfrac{3}{2}-dfrac{2}{-5}right):x-dfrac{1}{2}dfrac{3}{2}n) left(dfrac{3}{2}-dfrac{5}{11}-dfrac{3}{13}right)left(2x-2right)left(-dfrac{3}{4}+dfrac{5}{22}+dfrac{3}{26}right)
Đọc tiếp
g) \(3-\dfrac{2}{2x-3}=\dfrac{2}{5}=\dfrac{2}{9-6x}-\dfrac{3}{2}\)
h) \(\dfrac{x}{2}-\dfrac{1}{x}=\dfrac{1}{12}\)
i) \(x^2-\dfrac{7}{6}x+\dfrac{1}{3}=0\)
k) \(\dfrac{13}{x-1}+\dfrac{5}{2x-2}-\dfrac{6}{3x-3}\)
m) \(\left(\dfrac{3}{2}-\dfrac{2}{-5}\right):x-\dfrac{1}{2}=\dfrac{3}{2}\)
n) \(\left(\dfrac{3}{2}-\dfrac{5}{11}-\dfrac{3}{13}\right)\left(2x-2\right)=\left(-\dfrac{3}{4}+\dfrac{5}{22}+\dfrac{3}{26}\right)\)
12 tháng 9 2021 lúc 14:54
1. Tìm x
\(2\dfrac{1}{2}-x+\dfrac{4}{5}=\dfrac{2}{3}-\left(-\dfrac{4}{7}\right)\)
Bài 1: Tìm x:
a) x - \(\frac{4}{5}=\frac{7}{10}-\frac{3}{4}\)
b)\(2\frac{1}{3}-x=\frac{-5}{9}+2x\)
c) \(\frac{x+3}{2016}+\frac{x+2}{2017}=\frac{x+1}{2018}+\frac{x}{2019}\)
d) \(\frac{1}{x\left(x+1\right)}+\frac{1}{\left(x+1\right)\left(x+2\right)}+\frac{1}{\left(x+2\right)\left(x+3\right)}-\frac{1}{x}=\frac{1}{2010}\)