Violympic toán 6
Các câu hỏi tương tự
a) (frac{1}{2}+frac{1}{6}+frac{1}{12}+frac{1}{20}+...+frac{1}{132}) . x frac{1}{3}
b) (frac{2}{1.3}+frac{2}{3.5}+frac{2}{5.7}+frac{2}{7.9}+frac{2}{9.11}) : x frac{2}{3}
c) (frac{1}{1.3}+frac{1}{3.5}+frac{1}{5.7}+frac{1}{7.9}+frac{1}{9.11}) . x frac{2}{3}
Mik đang cần gấp
Đọc tiếp
a) (\(\frac{1}{2}+\frac{1}{6}+\frac{1}{12}+\frac{1}{20}+...+\frac{1}{132}\)) . x =\(\frac{1}{3}\)
b) (\(\frac{2}{1.3}+\frac{2}{3.5}+\frac{2}{5.7}+\frac{2}{7.9}+\frac{2}{9.11}\)) : x = \(\frac{2}{3}\)
c) (\(\frac{1}{1.3}+\frac{1}{3.5}+\frac{1}{5.7}+\frac{1}{7.9}+\frac{1}{9.11}\)) . x = \(\frac{2}{3}\)
Mik đang cần gấp
Tính hợp lí:
a, 75. ( -2frac{3}{25}+7frac{2}{75}-5frac{4}{15} )
b, 45.left(5frac{4}{15}-4frac{7}{9}-1frac{8}{45}right)
c, frac{-5}{8}+frac{14}{18}-frac{3}{8}+frac{2}{9}-frac{1}{2006}
d, frac{15}{29}-frac{8}{7}+frac{16}{14}+frac{14}{29}-frac{3}{8}
e, frac{1}{3.5}+frac{1}{5.7}+...+frac{1}{49.51}
Đọc tiếp
Tính hợp lí:
a, 75. ( \(-2\frac{3}{25}+7\frac{2}{75}-5\frac{4}{15}\) )
b, \(45.\left(5\frac{4}{15}-4\frac{7}{9}-1\frac{8}{45}\right)\)
c, \(\frac{-5}{8}+\frac{14}{18}-\frac{3}{8}+\frac{2}{9}-\frac{1}{2006}\)
d, \(\frac{15}{29}-\frac{8}{7}+\frac{16}{14}+\frac{14}{29}-\frac{3}{8}\)
e, \(\frac{1}{3.5}+\frac{1}{5.7}+...+\frac{1}{49.51}\)
Tìm giá trị của biểu thức \(P=\frac{2}{1.3}-\frac{4}{3.5}+\frac{6}{5.7}+\frac{8}{7.9}+...-\frac{96}{95.97}+\frac{98}{97.99}\)
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!!!!!!
tính Q=\(\frac{3}{3.5}+\frac{3}{5.7}+\frac{3}{7.9}+...+\frac{3}{47.49}\). kết quả là Q =
Bài 1: Tìm x
1)2left|frac{1}{2}.x-frac{3}{8}right|-frac{3}{2}frac{1}{4}
2) -5.left(x+frac{1}{5}right)-frac{1}{2}.left(x-frac{2}{3}right)frac{3}{2}.x-frac{5}{6}
3) 3.left(x-frac{1}{2}right)-5.left(x+frac{3}{5}right)-x+frac{1}{5}
4) frac{3}{4}-2.left|2.x-0,125right|2
5) 2.left|frac{1}{2}.x-frac{1}{3}right|-frac{3}{2}frac{1}{4}
Cần gấp giúp mình với ai trả lời mình tick cho.
Đọc tiếp
Bài 1: Tìm x
1)\(2\left|\frac{1}{2}.x-\frac{3}{8}\right|-\frac{3}{2}=\frac{1}{4}\)
2) -5.\(\left(x+\frac{1}{5}\right)-\frac{1}{2}.\left(x-\frac{2}{3}\right)=\frac{3}{2}.x-\frac{5}{6}\)
3) 3.\(\left(x-\frac{1}{2}\right)-5.\left(x+\frac{3}{5}\right)=-x+\frac{1}{5}\)
4) \(\frac{3}{4}-2.\left|2.x-0,125\right|=2\)
5) \(2.\left|\frac{1}{2}.x-\frac{1}{3}\right|-\frac{3}{2}=\frac{1}{4}\)
Cần gấp giúp mình với ai trả lời mình tick cho.
Tính giá trị của :
D=\(\left(\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+...+\frac{1}{2019^2}\right)x\left(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{2020^2}\right)-\left(\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+...+\frac{1}{2020^2}\right)x\left(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{2019^2}\right)\)
\(M=\left(\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+....+\frac{1}{2020^2}\right)X\left(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{2020^2}\right)-\left(\frac{1}{1^2}+\frac{1}{2^2}+\frac{1}{3^2}+...+\frac{1}{2020^2}\right)X\left(\frac{1}{2^2}+\frac{1}{3^2}+\frac{1}{4^2}+...+\frac{1}{2020^2}\right)\)Làm nhanh và ngắn gọn nhất có thể nhé ! mình tik cho 10 tik
tính tổng
a)\(\frac{9}{1.2}+\frac{9}{2.3}+\frac{9}{3.4}+...+\frac{9}{99.100}\)
b)\(\frac{3}{1.4}+\frac{3}{4.7}+\frac{3}{7.10}+...+\frac{3}{27.30}\)
c)\(\frac{2}{5.7}+\frac{2}{7.9}+\frac{2}{7.10}+...+\frac{2}{93.95}\)