Bài 1.
\(\frac{75}{100}\)+\(\frac{18}{21}\)+\(\frac{19}{32}\)+\(\frac{1}{4}\)+\(\frac{3}{21}\)+\(\frac{3}{32}\)
Bài 2.
\(\frac{7}{13}\)x\(\frac{5}{6}\)x\(\frac{5}{13}\)
Bài 3.Tính giá trị biểu thức sau.
a.0,1 + 0,2 + 0,3 + ... + 0,9 + 0,10 +0,11 + ... + 0,19.
b.( 1999 x 1998 +1998 x 1997 ) x (1 + \(\frac{1}{2}\): 1 \(\frac{1}{2}\) - 1 \(\frac{1}{3}\) )
Bài 1.
\(\frac{75}{100}+\frac{18}{21}+\frac{19}{32}+\frac{1}{4}+\frac{3}{21}+\frac{3}{32}\)
\(=\left(\frac{75}{100}+\frac{1}{4}\right)+\left(\frac{18}{21}+\frac{3}{21}\right)+\left(\frac{19}{32}+\frac{3}{32}\right)\)
\(=1+1+\frac{11}{16}\)
\(=2+\frac{11}{16}\) \(=\frac{43}{16}\)
