Thực hiện phép tính hợp lí nếu có thể:

a/ \(\frac{6}{7}+\frac{1}{7}\cdot\frac{2}{7}+\frac{1}{7}\cdot\frac{5}{7}\)

b/\(\frac{2}{3}\cdot\frac{5}{7}\cdot\frac{-3}{8}\cdot\frac{11}{5}\)

c/\(11\frac{4}{7}-\left(2\frac{3}{5}+5\frac{4}{7}\right)\)

d/\(\frac{3}{4}-\frac{3}{4}\cdot\left(\frac{2}{3}+1\right)\)

e/\(0.5\cdot1\frac{1}{3}\cdot75\%:\frac{2}{5}+\frac{3}{5}\)

f/\(\frac{6}{7}+\frac{5}{8}:5-\frac{3}{16}\cdot\left(-2\right)^2\)

g/\(1\frac{3}{8}+\left(\frac{-5}{6}+\frac{7}{12}\right):\frac{2}{3}\)

h/\(1\frac{1}{4}\cdot\frac{-3}{2}+50\%\cdot98\)

i/\(\left(2,09:1,1+4,5\right)\cdot\frac{5}{8}+4,32\)

B1: Thực hiện phép tính :

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

b, \(2\frac{17}{20}-1\frac{11}{5}+6\frac{9}{20}:3\)

c, \(4\frac{3}{7}:\left(\frac{7}{5}.4\frac{3}{7}\right)\)

d, \(\left(3\frac{2}{9}.\frac{15}{23}.1\frac{7}{29}\right):\frac{5}{23}\)

B2: Thực hiện phép tính:

\(a,11\frac{3}{4}-(6\frac{5}{6}4\frac{1}{2}+1\frac{2}{3})\\ b,\left(5\frac{7}{8}-2\frac{1}{4}-0,5\right):\frac{23}{26}\)

\(c,\left(17\frac{13}{15}-3\frac{3}{7}\right)-\left(2\frac{12}{15}-4\right)\\ d,2\frac{2}{3}.\frac{-4}{5}.0,375-\left(-10\right).\frac{-15}{24}\)

Thực hiện phép tính:

a) \(2+\frac{5}{4}-\frac{1}{3}\)      b) \(\left(2\frac{1}{3}-0,5\right).\frac{2}{3}-\left(-\frac{1}{2}\right)^2\)       c) \(\frac{7}{36}-\frac{8}{-9}+\frac{2}{3}\)     d) \(\frac{3}{4}.\left(\frac{6}{-5}\right)-\frac{1}{8}\)                e) \(1\frac{1}{4}:\left(1+\frac{2}{3}\right)\)    g) \(2+\frac{4}{5}-\frac{7}{12}\)        i) \(\frac{7}{12}+\frac{5}{12}:6-\frac{11}{36}\)           f) \(\frac{2}{3}-0,25:\frac{3}{4}+\frac{5}{8}.\left(-2\right)^2\)         h) \(\frac{4}{7}+\frac{5}{6}:5-0,375.\left(-2\right)^2\)

Tính giá trị biểu thức

a,\(A=\frac{24\cdot47-23}{24+47-23}\cdot\frac{3+\frac{3}{7}-\frac{3}{11}+\frac{3}{1001}-\frac{3}{13}}{\frac{9}{1001}-\frac{9}{13}+\frac{9}{7}-\frac{9}{11}+9}\)

b,\(M=\frac{1+2+2^2+2^3+...+2^{2012}}{2^{2014}-2}\)

c,\(A=81\cdot\left[\frac{12-\frac{12}{7}-\frac{12}{289}-\frac{12}{85}}{4-\frac{4}{7}-\frac{4}{289}-\frac{4}{85}}:\frac{5+\frac{5}{13}+\frac{5}{169}+\frac{5}{91}}{6+\frac{6}{13}+\frac{6}{169}+\frac{6}{91}}\right]:\frac{158158158}{711711711}\)

d,\(A=\frac{5\cdot\left(2^2.3^2\right)^9\cdot\left(2^2\right)^6-2\cdot\left(2^2\cdot3\right)^{14}\cdot3^4}{5\cdot2^{28}\cdot3^{18}-7\cdot2^{29}\cdot3^{18}}\)

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

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

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

\(\left(\frac{7}{8}-\frac{3}{4}\right)1\frac{1}{3}-\frac{2}{7}\left(3,5\right)^2\)

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

Thực hiện các phép tính

cảm ơn

câu 1:thực hiện phép tính (tính nhanh nếu có thể): 

a, \(\frac{-7}{25}.\frac{11}{13}+\frac{-7}{25}.\frac{2}{13}-\frac{18}{25}\)

b,\(\frac{5}{7}.\frac{1}{3}-\frac{5}{7}.\frac{1}{4}-\frac{5}{7}.\frac{1}{12}\)

c,\(5\frac{2}{5}.4\frac{2}{7}+5\frac{5}{7}.5\frac{2}{5}\)

d,\(75\%-1\frac{1}{2}+0,5:\frac{5}{12}-\left(\frac{-1}{2}\right)^2\)

câu 2:tìm x biết:

a, \(x+\frac{1}{6}=\frac{-3}{8}\)

b, \(\frac{1}{2}x+\frac{1}{8}x=\frac{3}{4}\)

c,\(2-\left|\frac{3}{4}-x\right|=\frac{7}{12}\)

d,\(\left(2x-4,5\right):\frac{3}{4}-\frac{1}{3}=1\)

GIÚP MIK VS MAI MIK PHẢI NỘP BÀI RỒI!

Bài 1: tính nhanh

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

b)\(\left(\frac{-4}{5}+\frac{4}{3}\right)+\left(\frac{-5}{4}+\frac{14}{5}\right)-\frac{7}{3}\)

c)\(\frac{8}{3}.\frac{2}{5}.\frac{3}{8}.10\frac{19}{92}\)

d)\(\frac{-5}{7}.\frac{2}{11}+\frac{-5}{7}.\frac{9}{14}+1\frac{5}{7}\)

e)\(\frac{12}{19}.\frac{7}{15}.\frac{-13}{17}.\frac{19}{12}.\frac{17}{13}\)