Đại số lớp 6
Các câu hỏi tương tự
\(\dfrac{0,8:\left(\dfrac{4}{5}.1,25\right)}{0,64-\dfrac{1}{25}}\)+\(\dfrac{\left(100-\dfrac{2}{5}\right):\dfrac{4}{7}}{6.\left(\dfrac{5}{9}-3\dfrac{1}{4}\right).2\dfrac{2}{17}}\)
help me, please
Nhanh lên nha, mai mình đi học rùi
Thank you so much
thực hiện phép tính
d) \(\dfrac{-5}{9}+\dfrac{3}{5}-\dfrac{3}{9}+\dfrac{-2}{5}\) c) \(\left(\dfrac{1}{9}-\dfrac{9}{17}\right)+\dfrac{3}{6}-\left(\dfrac{12}{17}-\dfrac{1}{2}\right)+\dfrac{5}{9}\)
help me!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Cho \(A=\dfrac{11}{9}+\dfrac{18}{16}+................+\dfrac{1766}{1764}\)Chứng minh rằng \(40\dfrac{23}{43}< A< 40\dfrac{20}{21}\)
Help me!!!!!!!!!!!
Tính \(H=\dfrac{\dfrac{1}{99}+\dfrac{2}{98}+\dfrac{3}{97}+...........+\dfrac{99}{1}}{\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+.............+\dfrac{1}{100}}:\dfrac{92-\dfrac{1}{9}-\dfrac{1}{10}-..............\dfrac{92}{100}}{\dfrac{1}{45}+\dfrac{1}{50}+\dfrac{1}{55}+........+\dfrac{1}{500}}\)
Help me!!!
Tính :
A=\(\dfrac{4}{3}.\dfrac{9}{8}.\dfrac{16}{15}.....\dfrac{100}{99}\)
Ai làm nhanh và đúng mk sẽ tk cho!!!Làm giúp mk!!!!! HELP ME!!!!
Chứng minh rằng với mọi \(n\in N\); \(n\ge2\) ta có :
\(\dfrac{3}{9.14}+\dfrac{3}{14.19}+\dfrac{3}{19.24}+..........+\dfrac{3}{\left(5n-1\right)\left(5n+4\right)}< \dfrac{1}{15}\)
Help me!!!!!!!!!!!!!!!!!!
TÍNH:
\(\dfrac{27}{10}+\dfrac{291}{100}+\dfrac{38}{100}+\dfrac{547}{1000}\dfrac{893}{10000}\)
TÍNH NHANH
a, \(\dfrac{2006\times2005-1}{2004\times2006+2005}\)\
b, \(18\times\left(\dfrac{19191919+88888}{21212121+99999}\right)\)
Bài 2 Tính nhanh
a) dfrac{5}{23} x dfrac{17}{26} + dfrac{5}{23} x dfrac{10}{26} - dfrac{5}{23}
b) dfrac{1}{7} x dfrac{5}{9} + dfrac{5}{9} x dfrac{2}{7} + dfrac{5}{9} x dfrac{1}{7} + dfrac{5}{9} x dfrac{3}{7}
Đọc tiếp
Bài 2 Tính nhanh
a) \(\dfrac{5}{23}\) x \(\dfrac{17}{26}\) + \(\dfrac{5}{23}\) x \(\dfrac{10}{26}\) - \(\dfrac{5}{23}\)
b) \(\dfrac{1}{7}\) x \(\dfrac{5}{9}\) + \(\dfrac{5}{9}\) x \(\dfrac{2}{7}\) + \(\dfrac{5}{9}\) x \(\dfrac{1}{7}\) + \(\dfrac{5}{9}\) x \(\dfrac{3}{7}\)
Cho \(A=\dfrac{1}{1.2.3}+\dfrac{1}{2.3.4}+..............+\dfrac{1}{18.19.20}\) Chứng minh \(A< \dfrac{1}{4}\)
Help me!!!!!!!