Tính:

a) \(\frac{2}{5}\)+  ( \(\frac{3}{4}\)-  \(\frac{7}{10}\))

b) \(\frac{-1}{8}\)-   ( \(\frac{2}{3}\)- \(\frac{11}{12}\))

c) \(\frac{7}{5}\)-  (\(\frac{1}{6}\)+ \(\frac{9}{10}\))

d) \(\frac{2}{3}\)+  (\(\frac{-1}{4}\))  +\(\frac{7}{12}\)-  ( \(\frac{-1}{4}\)) - \(\frac{5}{6}\)

e) 2 - { \(\frac{1}{2}\)- [ 2 -  ( \(\frac{1}{2}\)+ 2 ) - \(\frac{1}{2}\)] +2 }

a) Tính giá trị của biểu thức A, B bằng cách hợp lí:

A = \(\frac{5}{6}\)- \(\frac{-1}{12}\)+ \(\frac{2}{3}\)- \(\frac{-2}{7}\)+ \(\frac{1}{25}\)- \(\frac{-1}{4}\)-\(\frac{5}{42}\);        B = \(\frac{7.6^{10}.2^{20}.3^6-2^{19}.6^{15}}{9.6^{19}.2^9-4.3^{17}.2^{26}}\)

b) Cho M = \(\frac{2}{7.19}\)+ \(\frac{6}{7.27}\)+ \(\frac{1}{4.9}\)+ \(\frac{7}{43.12}\)+ \(\frac{8}{17.43}\)và   N = \(\frac{9}{7.19}\)+ \(\frac{5}{7.33}\)+ \(\frac{7}{33.10}\)+ \(\frac{11}{10.51}\)

Tính tỉ số \(\frac{M}{N}\)?

c) Tìm số tự nhiên x, biết: \(2^x\)+ \(2^{x+1}\)+ \(2^{x+2}\)+.......+ \(2^{x+2015}\)= \(2^{2017}\)- 2

Làm giúp mk nhé!

Bài 1: Thực hiện phép tính:

a) \(\frac{2}{3}\)+ \(\frac{1}{5}\)-\(\frac{1}{6}\)

b)\(\frac{5}{6}\)- \(\frac{1}{8}\)

c) (-11).\(\frac{9}{22}\)

d)\(\frac{5}{7}\). \(\frac{19}{23}\)+ \(\frac{5}{7}\). \(\frac{5}{23}\)- \(\frac{5}{7}\). \(\frac{1}{23}\)

e) \(\frac{-17}{25}\). \(\frac{20}{33}\)+ \(\frac{-17}{25}\). \(\frac{13}{33}\)+ \(\frac{-3}{25}\)

g) \(\frac{5}{11}\)+ \(\frac{6}{11}\)

Bài 2: Tìm x biết:

a) \(\frac{3}{4}\)+ x =\(\frac{11}{12}\)

b) x - \(\frac{11}{12}\)=0,5

Bài 1 : Thực hiện phép tính
 

a,          \(11\frac{3}{4}\)-   \((\) \(6\frac{5}{6}\)  - \(4\frac{1}{2}\) \()\) +  \(1\frac{2}{3}\)

b,            \(2\frac{17}{20}\)-   \(1\frac{11}{15}\)+\(6\frac{9}{20}\): 3

c,          \((\)\(17\frac{13}{15}\) -  \(3\frac{3}{7}\)\()\)-   \((\)\(2\frac{12}{15}\)-  4  \()\)

d,            \((\) \(3\frac{2}{9}\) x   \(\frac{15}{23}\)  x  \(1\frac{7}{29}\) \()\)\(\frac{5}{23}\)

Bài 2: Thực hiện phép tính:
a,         \(11\frac{3}{4}\) -  \((\) \(6\frac{5}{6}\) - \(4\frac{1}{2}\) + \(1\frac{2}{3}\) \()\)
b,       \((\) \(5\frac{7}{8}\) -  \(2\frac{1}{4}\) -  0,5 \()\):  \(2\frac{23}{26}\)
Giúp mình nhanh nhé. mình tịck ngay cho bạn làm  nhanh nhất đầu tiên 

Thực hiện phép tính:

a) (\(\frac{3}{8}\)+ \(\frac{-3}{4}\)+ \(\frac{7}{12}\)) : \(\frac{5}{6}\)+ \(\frac{1}{2}\)

b) \(\frac{1}{2}\)+ \(\frac{3}{4}\)- (\(\frac{3}{4}\)- \(\frac{4}{5}\))

c) \(6\frac{5}{12}\): \(2\frac{3}{4}\)+ \(11\frac{1}{4}\). (\(\frac{1}{3}\)- \(\frac{1}{5}\))

d) (\(\frac{7}{8}\)- \(\frac{3}{4}\)) . \(1\frac{1}{3}\)- \(\frac{2}{7}\). (3,5)²

e) (\(\frac{3}{5}\)+ 0,415 - \(\frac{3}{200}\)) .\(2\frac{2}{3}\). 0,25

f) \(\frac{5}{16}\): 0,125 - (\(2\frac{1}{4}\)- 0,6) . \(\frac{10}{11}\)

g) 0,25 : (10,3 - 9,8) - \(\frac{3}{4}\)

h) \(1\frac{13}{15}\). 0,75 - (\(\frac{11}{20}\)+ 25%) : \(\frac{7}{3}\)

i) \(\frac{\left(\frac{1}{2}-0,75\right).\left(0,2-\frac{2}{5}\right)}{\frac{5}{9}-1\frac{1}{12}}\)

k) \(\frac{\frac{2}{3}+\frac{2}{7}-\frac{1}{14}}{-1-\frac{3}{7}+\frac{3}{28}}\)

Tính a) (4 \(\frac{5}{37}\)- 3\(\frac{4}{5}\)+8\(\frac{15}{29}\)) - (3\(\frac{5}{37}\)- 6\(\frac{14}{29}\)

b) 60 \(\frac{7}{13}\)x (8\(\frac{7}{10}\)) +50\(\frac{8}{13}\)x (-8 \(\frac{7}{10}\)) - 11 \(\frac{2}{13}\)x (-8 \(\frac{7}{10}\)

c) (2 \(\frac{5}{6}\)+ 1\(\frac{4}{9}\)) : ( 10 \(\frac{1}{2}\)- 9 \(\frac{1}{2}\)

d) 1 \(\frac{5}{18}\)- \(\frac{5}{18}\)x (\(\frac{1}{15}\)+1\(\frac{1}{12}\))

e)\(\frac{-1}{7}\)x (9 \(\frac{1}{2}\) - 8,75) :\(\frac{2}{7}\) +0,625 :1 \(\frac{2}{3}\)

bài 2:

a,\(6\frac{4}{5}\)-(\(1\frac{2}{3}\)+\(3\frac{4}{5}\))

b,\(6\frac{5}{7}\)-(\(1\frac{3}{4}\)+\(2\frac{5}{7}\))

c,\(7\frac{5}{9}\)-(\(2\frac{3}{4}\)+\(3\frac{5}{9}\))

d,\(7\frac{5}{11}\)-(\(2\frac{3}{7}\)+\(3\frac{5}{11}\))

e,\(\frac{-3}{5}\).\(\frac{5}{7}\)+\(\frac{-3}{5}\).\(\frac{15}{19}\)+\(\frac{5}{7}\)

f,\(\frac{1}{3}\).\(\frac{4}{5}\)+\(\frac{1}{3}\).\(\frac{6}{5}\)-\(\frac{4}{3}\)

g,\(\frac{4}{19}\).\(\frac{-3}{7}\)+\(\frac{-3}{7}\).\(\frac{15}{19}\)+\(\frac{5}{7}\)

h,\(\frac{5}{9}\).\(\frac{7}{13}\)+\(\frac{5}{9}\).\(\frac{9}{13}\)-\(\frac{5}{9}\).\(\frac{3}{13}\)

mn ơi,giúp mk với ạ,mk cần gấp

Tính tổng, tích:

a)\(\frac{2}{2017}+\frac{2}{2018}\)phần\(\frac{5}{2017}+\frac{5}{2018}\)( xin lỗi vì mình ko ghi kí hiệu được)

b) B=(\(\frac{64}{128}\)+\(\frac{3}{4}\)):\(1\frac{3}{16}\)phần \(1\frac{11}{19}\)

c)\(\frac{2181.729+240.81+27}{^{3^2.9^2.234+18.54.162.9+723.729}}\)

d) A=(\(2\frac{1}{4}-5\frac{5}{9}\)).\(2\frac{2}{17}\)phần 6,75+\(\frac{1}{12}+3\frac{1}{6}\)-\(\frac{5}{12}\)(\(\frac{4}{5}-\frac{1}{10}\)):\(\frac{-5}{24}\)

e) 4-\(\frac{1}{23}-\frac{56}{39}-\frac{25}{47}\)phần \(\frac{5}{69}+\frac{5}{117}+\frac{5}{141}\)

HELP ME!

Tính hợp lí :

a,\(\frac{-3}{5}\)* \(\frac{2}{7}\)+\(\frac{-3}{7}\)*\(\frac{3}{5}\)+\(\frac{-3}{7}\)

b, \(\left(\frac{-5}{24}+0.75+\frac{7}{12}\right)\): \(\left(-2\frac{1}{4}\right)\)

c,\(\frac{4}{9}\): \(\left(-\frac{1}{7}\right)\)+\(6\frac{5}{9}\): \(\left(\frac{-1}{7}\right)\)

d, \(\frac{6^4\cdot3^2\cdot25^2-8^3\cdot9^2\cdot125}{5^2\cdot4^3\cdot3^4}\)

giúp mk nha