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:

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

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

tính:

a) \(25\%-\dfrac{5}{4}+1\dfrac{5}{6}\)

b) \(75\%:2\dfrac{1}{5}-\left(0,5\right)^2.\left(-7\right)+2,5\left(7\dfrac{2}{3}-5\dfrac{2}{3}\right)\)

c) \(45:2\dfrac{4}{7}+50\%-1,25\)

d) \(350\%:\dfrac{105}{24}+4\dfrac{5}{6}:2-\left(0,5\right)^2.30\%\)

e) \(4\dfrac{2}{5}.0,5-1\dfrac{3}{7}.14\%+\left(-0,8\right)\)

1.Thực hiện phép tính:

a) 45 : \(2\frac{4}{7}+50\)^o/_o - 1,25

b) \(4\frac{2}{5}.0,5-1\frac{3}{7}.14\)^o/_o + (-0,8)

c) \(1\frac{3}{8}+\frac{1}{8}:\)(75^o/_o - \(\frac{1}{2}\)) - 25^o/_o . \(\frac{1}{2}\)

d) 75^o/_o + 18 + 1,25 . \(\frac{4}{5}-18\frac{3}{4}\)

2.THPT:

A = \(\frac{9}{1.2}+\frac{9}{2.3}+\frac{9}{3.4}+...+\frac{9}{98.99}+\frac{9}{99.100}\)

B = \(\frac{2}{5.7}+\frac{2}{7.9}+\frac{2}{9.11}+...+\frac{2}{93.95}\)

C = \(\left(1-\frac{1000}{2017}\right).\left(1-\frac{1001}{2017}\right)...\left(1-\frac{2017}{2018}\right)\)

D = \(\frac{5}{2.7}+\frac{4}{7.11}+\frac{3}{11.14}+\frac{1}{14.15}+\frac{13}{15.28}\)

3. Tìm x:

a)\(\left(2\frac{4}{5}x-50\right):\frac{2}{3}=51\)

b) \(3\frac{1}{3}x+16\frac{3}{4}=-13,25\)

c) \(\frac{2}{3}x-\frac{5}{6}x=\frac{11}{24}\)

d) x + \(\frac{2}{5}x=\frac{-14}{55}\)

e) \(\frac{2}{5}x-x=\frac{\left(-2018\right)^0}{5^2}\)

f) x + \(\left(x+\frac{2}{7}\right)+\frac{-5}{11}=\frac{4}{11}\)

Help me!!!!!!

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!

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

a,\(\frac{2^{10}\cdot55+2^{10}\cdot26}{2^8\cdot27}\)

b,120:{300:[150-(2.5³-2³.25)]}

c,\(\left[\left(\frac{40}{130}-\frac{12}{13}\right)\cdot40\%+0,15\right]:\frac{-5}{52}\)

d,\(\frac{0,8:\left(\frac{4}{5}\cdot1,25\right)}{0,64-\frac{1}{25}}+\frac{\left(1,08-\frac{2}{25}\right):\frac{4}{7}}{\left(6\frac{5}{9}-3\frac{1}{4}\right)\cdot2\frac{2}{17}}+\left(1,2+0,5\right):\frac{1}{5}\)

Thực hiện phép tính

\(a,(\frac{-5}{28}+1,75+\frac{8}{35}).(-3\frac{9}{20})\) \(b,(6-2\frac{4}{5}).3\frac{1}{8}-1\frac{3}{5}:\frac{1}{4}\)

\(c,(\frac{7-5}{24}+0,75+\frac{7}{12}):(-2\frac{1}{8})\) \(d,8\frac{2}{7}-(3\frac{4}{7}+4\frac{2}{7})\)

\(e,\left(-3,2\right).\frac{-15}{64}+(0,8-2\frac{4}{15}):3\frac{2}{3}\) \(f,1\frac{13}{15}.\left(0,5\right)^2.3+(\frac{8}{15}-1\frac{19}{60}):1\frac{23}{24}\)

\(g,1,4.\frac{15}{49}-(\frac{4}{5}+\frac{2}{3}):2\frac{1}{5}\)

Bài 1:Thực hiện phép tính

\(a,75\%-1\frac{1}{2}+0,5:\frac{5}{12}-\left(\frac{-1}{2}\right)^2\)         \(b,\left(\frac{5}{7}.0,6-5:3\frac{1}{2}\right).\left(40\%-1,4\right).\left(-2\right)^3\)

Bài 2: Tính nhanh

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

Bài 3:Tìm x biết

\(a,\frac{-2}{3}-\frac{1}{3}.\left(2x-5\right)=\frac{3}{2}\)      \(b,\frac{2}{5}.x+\frac{1}{2}=\frac{-3}{4}\)      \(\frac{1}{3}.x-8=\frac{1}{2}\)       \(x-\frac{1}{4}=\frac{5}{8}.\frac{2}{3}\)

Bài 4: Tìm x biết

\(a,\left(\frac{3}{4}.x+2\frac{1}{2}\right).\frac{-2}{3}=\frac{1}{8}\)                          \(b,\frac{1}{3}.x-0,5=0,75\)

Bài 5: Tìm x biết 

\(a,\frac{2}{5}+\frac{3}{5}.\left(3x-3,7\right)=-\frac{53}{10}\)       \(b,5,2.x+7\frac{2}{5}=6\frac{3}{4}\)       \(2,4:\left(\frac{-1}{2}-x\right)=1\frac{3}{5}\)

Bài 6:Tìm số tự nhiên x,biết: \(\left(x-5\right).\frac{30}{100}=\frac{20.x}{100}+5\)

Mik đang cần gấp giúp mik nha!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!