\(-0,8\cdot1\frac{9}{25}-\frac{4}{5}\cdot\frac{64}{25}\)
\(=\frac{-4}{5}\cdot\frac{34}{25}+\frac{-4}{5}\cdot\frac{64}{25}\)
\(=\frac{-4}{5}\left(\frac{34}{25}+\frac{64}{25}\right)\)
\(=\frac{-4}{5}\cdot\frac{98}{25}\)
\(=\frac{-392}{125}\)
Chắc sai =))
Tính nhanh
\(\frac{1}{15}+\frac{4}{30}+\frac{9}{45}+\frac{16}{60}+\frac{25}{75}+\frac{36}{90}+\frac{49}{105}+\frac{64}{120}+\frac{81}{135}\)
tÍNH:
a, \(4\frac{25}{16}+25.\left(\frac{9}{16}-\frac{117}{64}\right):\frac{27}{8}\)
b, -15,5x20,8+3,5x9,2-15,5x9,2+3,5x20,8
c, \(\frac{5}{16}:0,125+1,456:\frac{7}{25}+4\frac{1}{2}.0,8\)
Tính nhanh giá trị biểu thức sau:\(\frac{4}{20}+\frac{9}{30}+\frac{16}{40}+\frac{25}{50}+\frac{36}{60}+\frac{49}{70}+\frac{64}{80}+\frac{81}{90}+\frac{100}{100}+\frac{121}{110}+\frac{144}{120}+\frac{169}{130}\)
Tính nhanh : \(\frac{0,8:\left[\frac{4}{5}.1,25\right]}{0,64-\frac{1}{25}}+\frac{1,08-\frac{2}{25}:\frac{4}{7}}{\left[6\frac{5}{9}-3\frac{1}{4}\right].2\frac{2}{7}}\)
Tính:
a) A=\(\frac{3-\frac{1}{2}+\frac{1}{4}}{\frac{2}{3}-\frac{5}{6}+\frac{-3}{4}}\)
b) B=\(\frac{8-\frac{8}{5}+\frac{8}{25}-\frac{8}{125}}{9-\frac{9}{5}+\frac{9}{25}-\frac{9}{125}}:\frac{161616}{151515}\)
Ai nhanh và đúng nhất mk sẽ tick cho
tk mn
\(4\frac{25}{16}+25.\left(\frac{9}{16}-\frac{117}{64}\right):\frac{27}{8}\)
Tính : \(\frac{3}{4}.\frac{8}{9}.\frac{15}{16}.\frac{24}{25}.\frac{35}{36}.\frac{48}{49}.\frac{63}{64}\)
\(4\frac{25}{16}\).25.\(\left(\frac{9}{16}-\frac{117}{64}\right)\): \(\frac{27}{8}\)
\(\frac{5}{16}\): 0.125+1.456: \(\frac{7}{25}\)+\(4\frac{1}{2}\)+0.8
tính nhanh \(-\frac{3}{4}.\frac{14}{25}-\frac{3}{4}.\frac{11}{25}\) ; \(\frac{3}{7}.\frac{9}{26}-\frac{1}{14}.\frac{1}{13}\) ; \(\frac{15}{19}.\left(3\frac{4}{5}.5\frac{1}{3}+4\frac{2}{3}.3\frac{4}{5}\right)\)
