0,75-0,6+3/7+3/13/-2,75-2,2+11/7+11/13
Tính nhanh giá trị của biểu thức
P =\(\dfrac{0,75-0,6+\dfrac{3}{7}+\dfrac{3}{13}}{2,75-2,2+\dfrac{11}{7}+\dfrac{11}{3}}=\dfrac{\dfrac{3}{4}-\dfrac{3}{5}+\dfrac{3}{7}+\dfrac{3}{13}}{\dfrac{11}{4}-\dfrac{11}{5}+\dfrac{11}{7}+\dfrac{11}{13}}\)
bài 2:tìm x giá trị biểu thức
a)2-\(|^{ }_{ }\)3x-\(\frac{1}{4}|\)=\(\left|-\frac{5}{4}\right|\) f)-2,5:\(\left|\frac{3}{4}x+\frac{1}{2}\right|=3\)
b)5-3.\(\left|5-2x\right|\)=-4,5 g)\(\left|2x-5\right|=\left|x=1\right|\)
c)\(\frac{3}{2}+\frac{3}{4}.\left|x-\frac{3}{4}\right|=\frac{7}{4}\)
d)\(\frac{11}{4}+\frac{3}{2}\left|4x-\frac{1}{5}\right|=\frac{7}{2}\)
e)\(\frac{21}{5}+3:\left|\frac{x}{4}-\frac{2}{3}\right|=6\) h)\(\left|\right|2x+1|-3|=\left|-5\right|\)
Tính:
a) C=\(\frac{8^{10}+4^{10}}{8^4+4^{11}}\)
b) D=\(\frac{1}{2.3}+\frac{1}{3.4}+\frac{1}{4.5}+...+\frac{1}{2015.2016}\)
c) E=\(\frac{1}{3}-\frac{3}{4}+\frac{3}{5}+\frac{2}{1015}-\frac{1}{36}+\frac{1}{15}-\frac{2}{9}\)
Tìm x biết
a) I x - 2I = x b) I x + 2I = x
c) I x - 3,4 I + I 2,6 - x I =0
d) I x I +x = \(\frac{1}{3}\) e) I x I - x =\(\frac{3}{4}\)
a)\(\frac{-3}{2}-2x+\frac{3}{4}=-2\)
b)\(\left(\frac{-2}{3}x-\frac{3}{5}\right)\left(\frac{3}{-2}-\frac{10}{3}\right)=\frac{2}{5}\)
c)\(\frac{x}{2}-\left(\frac{3x}{5}-\frac{13}{5}\right)=-\left(\frac{7}{5}+\frac{7}{10}.x\right)\)
d)\(\frac{2x-3}{3}+\frac{-3}{2}=\frac{5-3x}{6}-\frac{1}{3}\)
e)\(\frac{2}{3x}-\frac{3}{12}=\frac{4}{5}-\left(\frac{7}{x}2\right)\)
k)\(\frac{13}{x-1}+\frac{5}{2x-2}-\frac{6}{3x-3}\)
m)\(\left(\frac{3}{2}-\frac{2}{-5}\right):x-\frac{1}{2}=\frac{3}{2}\)
n)\(\left(\frac{3}{2}-\frac{5}{11}-\frac{3}{13}\right)\left(2x-2\right)=\left(\frac{-3}{4}+\frac{5}{22}+\frac{3}{26}\right)\)
Giải giúp mk
mk đang cần ghấp trong hôm nay
cám ơn mọi người
1) 0,75 - 2/3 - (0,5)
2) 1/5 - 0,125 - 5/4
3) 1,25 - 3/4 + 4/3
4) 0,15 - 1/4 + 2/5
5) 5- 3,4 + 1/5
6) 1/4 - 0,3 + 4/3
7) 0,2- 3,25+ 4,7
8) 5,4 + (-7,3)- (-5,7)
9) - 4,2 + 1/3 - 1/4
10) 5,4 - 1,5 - (7,2 - 1)
11) 4,9 - (1,5 - 7,7 + 3)
12) 7,8 - 4,7 + (5,3 - 1,4)
13) -8,9 + (,5 - 8,32)
14) 1/2 - 0,4 + 1/5
15) 4,2 - 4/5 + 1/2
Hỏi bài đêm phiaa=))) mai nộp bài rồi mà em vẫn còn nhiều bài quá mọi người giúp em với ạ,em cảm ơn:,)))
Tìm x,y ϵ Z
a,\(\frac{1}{x}=\frac{1}{6}+\frac{y}{3}\)
b,\(\frac{x}{6}-\frac{1}{y}=\frac{1}{2}\)
c,\(\frac{x}{4}-\frac{1}{y}=\frac{3}{4}\)
d,\(\frac{x}{8}-\frac{2}{y}=\frac{3}{4}\)
e,\(\frac{x}{4}-\frac{2}{y}=\frac{3}{2}\)
g,\(\frac{1}{x}-\frac{1}{y}=\frac{1}{x}.\frac{1}{y}\)
x≠y≠0
Tính
a, \(\frac{2^5.8^4.4^3}{16^6}\)
b, \(\frac{\left(\frac{1}{6}\right)^2.6^2+\left(0,6\right)^5}{\left(0,2\right)^5}\)
c, \(\left(\frac{3}{5}-\frac{3}{4}\right).\left(\frac{2}{6}-\frac{1}{5}\right)^2\)
d, \(\frac{8^4.3^6}{2^7.65}\)
e, \(\frac{2^5.49^2}{4^3.7^3}\)
