Các câu hỏi tương tự
tính nhanh: \(1\frac{1}{4}\times1\frac{1}{8}\times1\frac{1}{15}\times1\frac{1}{24}\times1\frac{1}{35}\times...\times1\frac{1}{9800}\)
Tính nhanh:
a) 12,5 x 40,7 + 59,3 x 12,5
b) 1,9 + 1,8 + 1,7 + 1,6 + 1,5 + 1,4 + 1,3 + 1,2 + 1,1
c) \(1\frac{1}{10}\times1\frac{1}{11}\times1\frac{1}{12}\times1\frac{1}{13}\times1\frac{1}{14}\times1\frac{1}{15}\times1\frac{1}{16}\)
N = \(1\frac{1}{3}\times1\frac{1}{8}\times1\frac{1}{15}\times1\frac{1}{24}\times...\times1\frac{1}{99}\)
Tính nhanh \(1\frac{1}{15}\times1\frac{1}{16}\times1\frac{1}{17}\times...\times1\frac{1}{2009}\times1\frac{1}{2010}\)
tính nhanh: \(1\frac{1}{13}\times1\frac{1}{14}\times1\frac{1}{15}\times....\times1\frac{1}{2013}\times1\frac{1}{2014}=?\)
Tinh nhanh:
\(1\frac{1}{3}\times1\frac{1}{8}\times1\frac{1}{15}\times...\times1\frac{1}{9800}\)
Tìm K sao cho: \(K-2016=\frac{1+\left(1+2\right)+\left(1+2+3\right)+...+\left(1+2+3+...+2017\right)}{2017\times1+2016\times2+2015\times3+...+2\times2016+2017\times1}\)
Tìm số tự nhiên X biết \(1\frac{1}{5}\times1\frac{1}{6}\times1\frac{1}{7}\times...\times1\frac{1}{2014}\) =X
\(1\frac{1}{3}\times\frac{1}{8}\times1\frac{1}{15}\times.....\times1\frac{1}{9800}\)