Violympic toán 6
Các câu hỏi tương tự
Tính nhanh
\(\frac{\frac{2}{5}+\frac{2}{7}+\frac{2}{9}+\frac{2}{11}+\frac{2}{13}}{\frac{3}{5}+\frac{3}{7}+\frac{3}{9}+\frac{3}{11}+\frac{3}{13}}+\frac{15151515}{45454545}\)
\(\frac{10+\frac{9}{2}+\frac{8}{3}+\frac{7}{4}+ \frac{6}{5}+\frac{5}{6}+\frac{4}{7}+\frac{3}{8}+\frac{2}{9}+\frac{1}{10}}{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{10}+\frac{1}{11}}\)
1.tính các biểu thức sau bằng một cách hợp lí
a.frac{108}{119}.frac{107}{211}+frac{108}{119}.frac{104}{211}
b.frac{15}{19}.frac{27}{33}+frac{15}{19}.frac{19}{33}-frac{15}{19}.frac{13}{33}
c.frac{-4}{5}.frac{13}{10}+frac{-4}{5}.frac{7}{10}-frac{-4}{5}
d.frac{frac{-2}{7}-frac{-2}{15}+frac{-2}{39}}{frac{5}{7}-frac{5}{15}+frac{5}{39}}
e.frac{3}{5}.frac{15}{7}-frac{15}{7}.frac{8}{5}
f.frac{2}{3}+frac{1}{3}.left(frac{-4}{9}+frac{5}{6}right):frac{7}{12}
h.frac{frac{3}{5}+frac{3}{7}-frac{3}{11}}{...
Đọc tiếp
1.tính các biểu thức sau bằng một cách hợp lí
a.\(\frac{108}{119}.\frac{107}{211}+\frac{108}{119}.\frac{104}{211}\)
b.\(\frac{15}{19}.\frac{27}{33}+\frac{15}{19}.\frac{19}{33}-\frac{15}{19}.\frac{13}{33}\)
c.\(\frac{-4}{5}.\frac{13}{10}+\frac{-4}{5}.\frac{7}{10}-\frac{-4}{5}\)
d.\(\frac{\frac{-2}{7}-\frac{-2}{15}+\frac{-2}{39}}{\frac{5}{7}-\frac{5}{15}+\frac{5}{39}}\)
e.\(\frac{3}{5}.\frac{15}{7}-\frac{15}{7}.\frac{8}{5}\)
f.\(\frac{2}{3}+\frac{1}{3}.\left(\frac{-4}{9}+\frac{5}{6}\right):\frac{7}{12}\)
h.\(\frac{\frac{3}{5}+\frac{3}{7}-\frac{3}{11}}{\frac{4}{5}+\frac{4}{7}-\frac{4}{11}}\)
g.\(\frac{3}{-4}+\frac{2}{7}+\frac{-1}{4}+\frac{5}{7}+\frac{21}{22}.\frac{66}{7}\)
k.\(\frac{27.18+27.103-120.27}{15.33+33.12}\)
l.\(\frac{\frac{2}{5}+\frac{2}{7}-\frac{2}{9}-\frac{2}{11}}{\frac{4}{5}+\frac{4}{7}-\frac{4}{9}-\frac{4}{11}}\)
các bạn có thể giúp mình bài này không
\(B=\frac{\frac{1}{9}-\frac{1}{7}-\frac{1}{11}}{\frac{1}{9}-\frac{1}{7}-\frac{1}{11}}+\frac{\frac{3}{5}-\frac{3}{25}-\frac{3}{125}-\frac{3}{625}}{\frac{4}{5}-\frac{4}{25}-\frac{4}{125}-\frac{4}{625}}\)
Tính giá trị của biểu thức:
a)\(A=\) \(\frac{\frac{1}{3}+\frac{1}{9}-\frac{1}{27}}{\frac{5}{3}+\frac{5}{9}-\frac{5}{27}}\)
b)\(B=\frac{\frac{2}{3}-\frac{1}{4}+\frac{5}{11}}{\frac{5}{12}+1-\frac{7}{11}}\)
3,Tính hợp lý
a,\(\frac{3}{7}\cdot\frac{4}{9}+\frac{3}{7}\cdot\frac{5}{9}+\frac{5}{14}\)
b,\(\frac{-11}{23}\cdot\frac{6}{7}+\frac{8}{9}\cdot\frac{-11}{23}-\frac{1}{23}\)
Giúp mình nhé!!!
Bài 1: Tính (hợp lý nếu có thể)
a) frac{8}{40}+frac{-4}{20}-frac{3}{5}
b) frac{-7}{12}+frac{-2}{12}-frac{-3}{36}
c) (frac{1}{6}+frac{-4}{13})-(frac{-17}{6}-frac{30}{13})
d) -frac{-5}{4}+frac{7}{4}-frac{-11}{7}+frac{2}{7}
e) -frac{1}{8}+frac{-7}{9}+frac{-7}{8}+frac{6}{7}+frac{2}{14}
f) frac{-2}{9}-frac{11}{-9}+frac{5}{7}-frac{-6}{-7}
Đọc tiếp
Bài 1: Tính (hợp lý nếu có thể)
a) \(\frac{8}{40}+\frac{-4}{20}-\frac{3}{5}\)
b) \(\frac{-7}{12}+\frac{-2}{12}-\frac{-3}{36}\)
c) \((\frac{1}{6}+\frac{-4}{13})-(\frac{-17}{6}-\frac{30}{13})\)
d) \(-\frac{-5}{4}+\frac{7}{4}-\frac{-11}{7}+\frac{2}{7}\)
e) \(-\frac{1}{8}+\frac{-7}{9}+\frac{-7}{8}+\frac{6}{7}+\frac{2}{14}\)
f) \(\frac{-2}{9}-\frac{11}{-9}+\frac{5}{7}-\frac{-6}{-7}\)
Thực hiện các phép tính:
a) \(\frac{5}{9}:\frac{13}{7}+\frac{5}{9}:\frac{13}{9}-1\frac{2}{3}\)
b) \(\left(15-6\frac{13}{18}\right):11\frac{1}{27}-2\frac{1}{8}:1\frac{11}{40}\)
1 TÍNH :
a, \(\frac{1}{6}.\frac{9}{-8}.\left(\frac{-12}{11}\right)\)
b, \(\frac{1}{8}.\frac{-3}{7}+\frac{1}{8}.\frac{-4}{7}\)
c, \(\frac{7}{13}.\frac{3}{-5} +\frac{6}{13}.\frac{-3}{5}\)