Violympic toán 6
Các câu hỏi tương tự
\(\frac{10+\frac{9}{2}+\frac{8}{3}+\frac{7}{4}+ \frac{6}{5}+\frac{5}{6}+\frac{4}{7}+\frac{3}{8}+\frac{2}{9}+\frac{1}{10}}{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{10}+\frac{1}{11}}\)
Bài 1: Thực hiện phép tính(hợp lý nếu có thể). a) \(\left(-1\frac{1}{2}\right):\frac{3}{4}.\left(-4\frac{1}{2}\right)\) b) \(21-3\frac{3}{4}:\left(\frac{3}{8}-\frac{1}{6}\right)\) c) \(\frac{5}{4}-\frac{5}{4}:\left(\frac{3}{8}-\frac{1}{6}\right):\frac{11}{12}\)
1.thực hiện phép tính
a.frac{-1}{12}-left(2^5_8-frac{1}{3}right)
b.-1,75-left(frac{-1}{9}-2^1_{18}right)
c.frac{2}{5}+frac{-4}{3}+frac{-1}{2}
d.frac{3}{12}-left(frac{6}{15}-frac{3}{10}right)
e.left(8^5_{11}+3^5_8right)-3^5_{11}
f.frac{4}{9}:left(frac{-1}{7}right)+6^5_9:left(frac{-1}{7}right)
g.frac{-1}{4}.13^9_{11}-0,25.6^2_{11}
h.5^{27}_5+frac{27}{23}+0,5-frac{5}{27}+frac{16}{23}
i.frac{3}{8}.27^1_5-51^1_5.frac{3}{8}+19
Đọc tiếp
1.thực hiện phép tính
a.\(\frac{-1}{12}-\left(2^5_8-\frac{1}{3}\right)\)
b.-1,75-\(\left(\frac{-1}{9}-2^1_{18}\right)\)
c.\(\frac{2}{5}+\frac{-4}{3}+\frac{-1}{2}\)
d.\(\frac{3}{12}-\left(\frac{6}{15}-\frac{3}{10}\right)\)
e.\(\left(8^5_{11}+3^5_8\right)-3^5_{11}\)
f.\(\frac{4}{9}:\left(\frac{-1}{7}\right)+6^5_9:\left(\frac{-1}{7}\right)\)
g.\(\frac{-1}{4}.13^9_{11}-0,25.6^2_{11}\)
h.\(5^{27}_5+\frac{27}{23}+0,5-\frac{5}{27}+\frac{16}{23}\)
i.\(\frac{3}{8}.27^1_5-51^1_5.\frac{3}{8}+19\)
a,1frac{13}{15}.0,75-left(frac{8}{15}+0,25right).frac{24}{47}
b,5:left(4frac{3}{4}-1frac{25}{28}right)-1frac{3}{8}:left(frac{3}{8}+frac{9}{20}right)
c,6frac{5}{12}:2frac{3}{4}+11frac{1}{4}.left(frac{1}{3}-frac{1}{5}right)
d,left(frac{3}{5}+0,415-frac{3}{200}right).2frac{2}{3}.0,25
e,left(frac{3}{8}+frac{-3}{4}+frac{7}{12}right):frac{5}{6}+frac{1}{2}
g,1frac{13}{15}.0,75-left(frac{11}{20}+25%right);frac{7}{3}
Đọc tiếp
\(a,1\frac{13}{15}.0,75-\left(\frac{8}{15}+0,25\right).\frac{24}{47}\)
\(b,5:\left(4\frac{3}{4}-1\frac{25}{28}\right)-1\frac{3}{8}:\left(\frac{3}{8}+\frac{9}{20}\right)\)
\(c,6\frac{5}{12}:2\frac{3}{4}+11\frac{1}{4}.\left(\frac{1}{3}-\frac{1}{5}\right)\)
\(d,\left(\frac{3}{5}+0,415-\frac{3}{200}\right).2\frac{2}{3}.0,25\)
\(e,\left(\frac{3}{8}+\frac{-3}{4}+\frac{7}{12}\right):\frac{5}{6}+\frac{1}{2}\)
\(g,1\frac{13}{15}.0,75-\left(\frac{11}{20}+25\%\right);\frac{7}{3}\)
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) \(\frac{-2}{9}-\frac{11}{-9}+\frac{5}{7}-\frac{-6}{-7}\)
1.Thực hiện phép tính:
a) 45 : 2frac{4}{7}+50o/o - 1,25
b) 4frac{2}{5}.0,5-1frac{3}{7}.14o/o + (-0,8)
c) 1frac{3}{8}+frac{1}{8}:(75o/o - frac{1}{2}) - 25o/o . frac{1}{2}
d) 75o/o + 18 + 1,25 . frac{4}{5}-18frac{3}{4}
2.THPT:
A frac{9}{1.2}+frac{9}{2.3}+frac{9}{3.4}+...+frac{9}{98.99}+frac{9}{99.100}
B frac{2}{5.7}+frac{2}{7.9}+frac{2}{9.11}+...+frac{2}{93.95}
C left(1-frac{1000}{2017}right).left(1-frac{1001}{2017}right)...left(1-frac{2017}{2018}right)
D frac{5}{2.7}+frac{4}{7.11}+fr...
Đọc tiếp
1.Thực hiện phép tính:
a) 45 : \(2\frac{4}{7}+50\)o/o - 1,25
b) \(4\frac{2}{5}.0,5-1\frac{3}{7}.14\)o/o + (-0,8)
c) \(1\frac{3}{8}+\frac{1}{8}:\)(75o/o - \(\frac{1}{2}\)) - 25o/o . \(\frac{1}{2}\)
d) 75o/o + 18 + 1,25 . \(\frac{4}{5}-18\frac{3}{4}\)
2.THPT:
A = \(\frac{9}{1.2}+\frac{9}{2.3}+\frac{9}{3.4}+...+\frac{9}{98.99}+\frac{9}{99.100}\)
B = \(\frac{2}{5.7}+\frac{2}{7.9}+\frac{2}{9.11}+...+\frac{2}{93.95}\)
C = \(\left(1-\frac{1000}{2017}\right).\left(1-\frac{1001}{2017}\right)...\left(1-\frac{2017}{2018}\right)\)
D = \(\frac{5}{2.7}+\frac{4}{7.11}+\frac{3}{11.14}+\frac{1}{14.15}+\frac{13}{15.28}\)
3. Tìm x:
a)\(\left(2\frac{4}{5}x-50\right):\frac{2}{3}=51\)
b) \(3\frac{1}{3}x+16\frac{3}{4}=-13,25\)
c) \(\frac{2}{3}x-\frac{5}{6}x=\frac{11}{24}\)
d) x + \(\frac{2}{5}x=\frac{-14}{55}\)
e) \(\frac{2}{5}x-x=\frac{\left(-2018\right)^0}{5^2}\)
f) x + \(\left(x+\frac{2}{7}\right)+\frac{-5}{11}=\frac{4}{11}\)
Help me!!!!!!
1. Tìm x, biết:
a) \(\frac{2}{5}x-x=\frac{\left(-2018\right)^0}{5^2}\)
b) \(\left|-1\frac{1}{2}x+2x\right|-\frac{7}{4}=0,5\)
c) x + \(\left(x+\frac{2}{7}\right)+\frac{-5}{11}=\frac{4}{11}\)
d) |0,25x - 20o/o| \(+\frac{3}{8}=1\frac{3}{8}\)
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.\(\frac{\frac{2}{5}+\frac{2}{7}-\frac{2}{9}-\frac{2}{11}}{\frac{4}{5}+\frac{4}{7}-\frac{4}{9}-\frac{4}{11}}\)
Thực hiện các phép tính:
a) \(\frac{5}{9}:\frac{13}{7}+\frac{5}{9}:\frac{13}{9}-1\frac{2}{3}\)
b) \(\left(15-6\frac{13}{18}\right):11\frac{1}{27}-2\frac{1}{8}:1\frac{11}{40}\)