A = ( 6 - \(\dfrac{2}{3}\) + \(\dfrac{1}{2}\)) - ( 5 + \(\dfrac{5}{3}\) - \(\dfrac{3}{2}\)) - (3 - \(\dfrac{7}{3}\) + \(\dfrac{5}{2}\))

tính nhanh :

a,\(\dfrac{4}{3}\) - [(\(\dfrac{-11}{6}\) )- (\(\dfrac{2}{9}\) + \(\dfrac{5}{3}\))]

b, (8- \(\dfrac{9}{4}\) +\(\dfrac{2}{7}\) ) - ( -6 -\(\dfrac{3}{7}\) +\(\dfrac{5}{4}\) ) - ( 3+ \(\dfrac{2}{4}\) - \(\dfrac{9}{7}\) )

x-3=5-x

Tìm x biết: (x-3)^2-x|x-3|=0

tim a b \(\in Q\)

a, a - b = 2 \(\left(a+b\right)=a\div b\)

b, a + b = a . b = a \(\div\) b

giup minh nhe minh dang can gap

mẫu chung của 9;6;4

tìm x biết :

\(\dfrac{-4}{7}-x=\dfrac{3}{5}-2\cdot x\)

giúp mk nha 5h đi học rùi

\(\left(\dfrac{1}{2}.x-\dfrac{2}{3}\right)-\left(\dfrac{1}{3}.x-1\right)=\left(x-3\right)-\left(x-1\right)\)

\(\dfrac{x+1}{x+2}=\dfrac{0,8}{1,2}\)

\(\dfrac{2^{19}+27^3+15.4^9.9^4}{6^9.2^{10}+12^{10}}\)

so sanh

a) \(5^{20}và2550^{10}\)

b)\(999^{10}và999999^5\)

c)\(\left(\dfrac{-1^{300}}{5}\right)và\left(\dfrac{-1^{500}}{3}\right)\)