Ôn tập cuối năm phần số học
Các câu hỏi tương tự
Tìm x
a)\(5\frac{8}{17}:x+\left(-\frac{4}{7}\right)+3\frac{1}{7}:17\frac{1}{3}=\frac{4}{11}\)
b) \(\left(x+\frac{1}{5}\right)^2+\frac{17}{25}=\frac{26}{25}\)
Xin giải giúp:
1. \(\left(x-\frac{5}{24}\right)\frac{18}{7}=-\frac{12}{7}\)
2. \(\frac{3}{4}+\frac{1}{4}\left(x-1\right)=\frac{1}{2}\)
3. \(\left(4x-\frac{1}{2}\right)\left(\frac{x}{3}-\frac{1}{5}\right)=0\)
Cảm ơn nhiều!!
tìm x biết
a)
frac{1}{2}+frac{2}{3}.xfrac{4}{5}
b)
x+frac{1}{4}frac{4}{3}|
c)
frac{3}{5}x-frac{1}{2}-frac{1}{7}
|d)
left|x+5right|-69
e)
left|x-frac{4}{5}right|frac{3}{4}
f)
frac{1}{2}-left|xright|frac{1}{3}
g)
^{x^2}16
h)
left(x-frac{1}{2}right)^3frac{1}{27}
i)
^{3^3}.x^{3^6}
j)
frac{1,35}{0,2}frac{1,25}{x}
k)
1frac{2}{3}:x6:0,3
Đọc tiếp
tìm x biết
a)
\(\frac{1}{2}\)+\(\frac{2}{3}\).x=\(\frac{4}{5}\)
b)
x+\(\frac{1}{4}\)=\(\frac{4}{3}\)|
c)
\(\frac{3}{5}x-\frac{1}{2}=-\frac{1}{7}\)
|d)
\(\left|x+5\right|-6=9\)
e)
\(\left|x-\frac{4}{5}\right|=\frac{3}{4}\)
f)
\(\frac{1}{2}-\left|x\right|=\frac{1}{3}\)
g)
\(^{x^2}\)=16
h)
\(\left(x-\frac{1}{2}\right)^3=\frac{1}{27}\)
i)
\(^{3^3}\).x=\(^{3^6}\)
j)
\(\frac{1,35}{0,2}=\frac{1,25}{x}\)
k)
\(1\frac{2}{3}:x=6:0,3\)
tìm x biết \(\frac{2}{3}x:\frac{1}{5}=1\frac{1}{5}:25\%\)
Tìm x\(\varepsilon\)biết \(\frac{4}{3}.\left(\frac{1}{6}-\frac{1}{2}\right)\)<x<\(\frac{2}{3}\).\(\left(\frac{-1}{6}+\frac{3}{4}\right)\)
Thực hiện phép tính
a,(frac{-5}{28}+1,75+frac{8}{35}).(-3frac{9}{20}) b,(6-2frac{4}{5}).3frac{1}{8}-1frac{3}{5}:frac{1}{4}
c,(frac{7-5}{24}+0,75+frac{7}{12}):(-2frac{1}{8}) d,8frac{2}{7}-(3frac{4}{7}+4frac{2}{7})
e,left(-3,2right).frac{-15}{64}+(0,8-2frac{4}{15}):3frac{2}{3} f,1frac{13}{15}.left(0,5right)^2.3+(frac{8}{15}-1frac{19}{60}):1frac{23}{24}
g,1,4.frac{15}{49}-(frac{4}{5}+frac{2}{3}):2f...
Đọc tiếp
Thực hiện phép tính
\(a,(\frac{-5}{28}+1,75+\frac{8}{35}).(-3\frac{9}{20})\) \(b,(6-2\frac{4}{5}).3\frac{1}{8}-1\frac{3}{5}:\frac{1}{4}\)
\(c,(\frac{7-5}{24}+0,75+\frac{7}{12}):(-2\frac{1}{8})\) \(d,8\frac{2}{7}-(3\frac{4}{7}+4\frac{2}{7})\)
\(e,\left(-3,2\right).\frac{-15}{64}+(0,8-2\frac{4}{15}):3\frac{2}{3}\) \(f,1\frac{13}{15}.\left(0,5\right)^2.3+(\frac{8}{15}-1\frac{19}{60}):1\frac{23}{24}\)
\(g,1,4.\frac{15}{49}-(\frac{4}{5}+\frac{2}{3}):2\frac{1}{5}\)
Tính nhanh ( nếu có thể):
a,-3^2+left{-52:[left(-3right)^2right} d,(frac{377}{-231}-frac{123}{89}+frac{34}{791}):(frac{1}{6}-frac{1}{8}-frac{1}{24})
b,2frac{3}{7}+(frac{2}{9}-1frac{3}{7})-frac{5}{3}:frac{1}{9} e,frac{-5}{13}:frac{3}{7}-frac{2}{7}.frac{8}{13}+frac{5}{13}.frac{1}{7}
c,frac{-11}{23}.frac{6}{7}+frac{8}{7}.frac{-11}{23}-frac{1}{23}
Đọc tiếp
Tính nhanh ( nếu có thể):
\(a,-3^2+\left\{-52:[\left(-3\right)^2\right\}\) \(d,(\frac{377}{-231}-\frac{123}{89}+\frac{34}{791}):(\frac{1}{6}-\frac{1}{8}-\frac{1}{24})\)
\(b,2\frac{3}{7}+(\frac{2}{9}-1\frac{3}{7})-\frac{5}{3}:\frac{1}{9}\) \(e,\frac{-5}{13}:\frac{3}{7}-\frac{2}{7}.\frac{8}{13}+\frac{5}{13}.\frac{1}{7}\)
\(c,\frac{-11}{23}.\frac{6}{7}+\frac{8}{7}.\frac{-11}{23}-\frac{1}{23}\)
bài 1
a, \(\frac{-3}{7}\)-\(\left\{\frac{2}{3}-\frac{3}{7}\right\}\) b,\(\frac{2}{15}:\left[\frac{1}{3}.\frac{4}{5}-\frac{1}{3}.\frac{6}{5}\right]\)
1. tính nhanh
a) \(15\frac{3}{13}-\left(3\frac{4}{7}+8\frac{3}{13}\right)\)
b) \(\left(7\frac{4}{9}+4\frac{7}{11}\right)-3\frac{1}{2}\)
c) \(\frac{-7}{9}\times\frac{4}{11}+\frac{-7}{9}\times\frac{7}{11}+5\frac{7}{9}\)
Bài 1 : Chứng tỏ rằng : \(\frac{14n+3}{21n+5}\) là phân số tối giản với mọi n ϵ Z
Bài 2 Tìm x , biết
30 : \(\left(\frac{1}{4}x+\frac{3}{4}x\right)^2=\frac{5}{6}\)
Bài 3 Tính tích : A= \(\frac{3}{4}.\frac{8}{9}.\frac{15}{16}...\frac{899}{900}\)