= 3 . ( 1/5 + 1/25 + 1/125 + 1/625 )
= 3 . ( 125/625 + 25/625 + 5/625 + 1/625 )
= 3 . 156/625
= 468/625
= 3 . ( 1/5 + 1/25 + 1/125 + 1/625 )
= 3 . ( 125/625 + 25/625 + 5/625 + 1/625 )
= 3 . 156/625
= 468/625
\(3+\frac{3}{5}+\frac{3}{25}+\frac{3}{125}+\frac{3}{625}\)
T-nh nhanh : (Dấu - là chữ y ngắn)
\(3+\frac{3}{5}+\frac{3}{25}+\frac{3}{125}+\frac{3}{625}\)
Tính :
\(\frac{0,6:\frac{4}{5}.125}{0,64-\frac{1}{25}}+\frac{\left(10-\frac{2}{25}\right):\frac{4}{70}}{\left(6\frac{5}{9}-3\frac{1}{4}\right).2\frac{1}{17}}+\frac{6}{5}.\frac{1}{2}:\frac{3}{5}\)
\(1+\frac{1}{5}+\frac{1}{25}+\frac{1}{125}+\frac{1}{625}+.......+\frac{1}{78125}\)
tính hộ nha
Chuyển các phân số sau thành số thập phân :
\(\frac{2}{5}\); \(\frac{3}{25}\); \(\frac{98}{125}\); \(\frac{3}{4}\); \(\frac{1}{2}\)
Tính:
a,\(\frac{\left(3+\frac{1}{6}\right)-\frac{2}{5}}{\left(5-\frac{1}{6}\right)+\frac{7}{10}}\)
b,\(\frac{\left(4,08-\frac{2}{25}\right):\frac{4}{17}}{\left(6\frac{5}{9}-3\frac{1}{4}\right)x2\frac{2}{7}}\)
c,\(\frac{2-\frac{1}{4}+\frac{1}{3}-\frac{3}{5}}{3-\frac{1}{5}-\frac{5}{3}}\)
Tính : \(\frac{0,6:\frac{4}{5.}.1,25}{0,64-\frac{1}{25}}+\frac{\left(10-\frac{2}{25}\right):\frac{4}{70}}{\left(6\frac{5}{9}-3\frac{1}{4}\right).2\frac{1}{17}}+\frac{6}{5}.\frac{1}{2}:\frac{3}{5}\)
3/Tìm x
x : 142 + 457 = 625
x - 16,7 + 8,6 = 16,9
( x - 1\(\frac{3}{4}\)) x : 2\(\frac{1}{4}\)= \(\frac{5}{3}\)
Tính giá trị biểu thức:
\(A=\frac{\frac{16}{10}:\left(1\frac{3}{5}\times \frac{5}{4}\right)}{\frac{64}{100}-\frac{1}{25}}+\frac{\left(\frac{108}{100}-\frac{2}{25}\right):\frac{4}{7}}{\left(5\frac{5}{9}-2\frac{1}{4}\right)\times 2\frac{2}{17}}+\frac{3}{5}\times \frac{1}{2}:\frac{2}{5}\)