\(1\frac{3}{5}x2\frac{4}{3}+\frac{2}{5}=\frac{8}{5}x\frac{10}{3}+\frac{2}{5}=\frac{16}{3}+\frac{2}{5}=\frac{86}{15}\)
\(1\frac{3}{5}x2\frac{4}{3}+\frac{2}{5}=\frac{8}{5}x\frac{10}{3}+\frac{2}{5}=\frac{16}{3}+\frac{2}{5}=\frac{86}{15}\)
Tính tổng dãy số vô hạn sau:
a)\(\frac{1}{3-2+6}+\frac{2}{3-2+6}+\frac{3}{3-2+6}+...\)
b)\(\frac{2}{4\times8}+\frac{4}{4\times8}+\frac{6}{4\times8}+...\)
c)\(1+2-3+4-5+...\)
d)\(\left(-10\right)+\left(-11\right)+\left(-12\right)+...\)
Tìm x
\(\frac{1}{4}+\frac{1}{3}:2x=-5\)
\(\frac{2}{3}+\frac{9}{6}\)
\(\frac{4}{5}+\frac{25}{15}\)
\(\frac{20}{10}+\frac{8}{2}\)
a, 1 x 3 x 5 x 7 = ??
b, \(\frac{1}{5}\times\frac{1}{8}=??\)
a)\(\frac{1}{5}\)x(a+\(\frac{4}{7}\))=\(\frac{2}{8}\) b)\(\frac{5x}{4}\)-\(\frac{1}{7}\)=\(\frac{2}{5}\)
Cho \(M=\frac{\sqrt{2}-\sqrt{1}}{1+2}+\frac{\sqrt{3}-\sqrt{2}}{2+3}+\frac{\sqrt{4}-\sqrt{3}}{3+4}+...+\frac{\sqrt{2015}-\sqrt{2014}}{2014+2015}\). Hãy so sánh M với \(\frac{1}{2}\)
Sắp xếp các số từ bé đến lớn: \(\frac{1}{8}\), \(\frac{1}{6}\), \(\frac{1}{2}\), \(\frac{1}{9}\), \(\frac{1}{4}\), \(\frac{1}{3}\), \(\frac{1}{7}\), \(\frac{1}{5}\), \(\frac{1}{10}\), \(\frac{1}{100}\), \(\frac{1}{1000}\).
tìm x,y
a\(\frac{x}{2}=\frac{y}{-5}\)và x-y=35
b2.x=y.4 và x+4=30
( x -\(\frac{2}{3}\)) *3 = \(\frac{3}{4}\)