Các câu hỏi tương tự
1.
b) \(B=8\dfrac{1}{5}.\left(11\dfrac{94}{1591}-6\dfrac{38}{1517}\right):8\dfrac{11}{43}\)
c) \(C=10101.\left(\dfrac{5}{111111}+\dfrac{5}{222222}-\dfrac{4}{3.7.11.13.37}\right)\)
10101. (5/11111 5/22222- 4/3.7.11.13.37)
Tính nhanh:
a, \(A=\frac{1.2.3+2.4.6+3.6.9+4.8.12}{3.4.5+6.8.10+9.12.15+12.16.20}\)
b, \(B=10101.\left(\frac{5}{111111}+\frac{2}{333333}+\frac{19}{3.7.11.13.37}\right)\)
a) 2dfrac{1}{2} - x + dfrac{4}{5} dfrac{2}{3} - (-dfrac{4}{7} )
b) -dfrac{4}{7} - x dfrac{3}{5} - 2x
c) (dfrac{3}{8} - dfrac{1}{5} ) + (dfrac{5}{8} - x) dfrac{1}{5}
Đọc tiếp
a) \(2\dfrac{1}{2}\) - x + \(\dfrac{4}{5}\) = \(\dfrac{2}{3}\) - (\(-\dfrac{4}{7}\) )
b) \(-\dfrac{4}{7}\) - x = \(\dfrac{3}{5}\) - 2x
c) (\(\dfrac{3}{8}\) - \(\dfrac{1}{5}\) ) + (\(\dfrac{5}{8}\) - x) = \(\dfrac{1}{5}\)
Tính giá trị biểu thức
a, A=\(\left(-1\frac{1}{3}\right)\left(-1\frac{1}{4}\right)\left(-1\frac{1}{5}\right)...\left(-1\frac{1}{2018}\right)\)
b. B=\(10101\left(\frac{6}{111111}+\frac{6}{222222}+\frac{7}{3.7.11.13.17}\right)\)
20 tháng 12 2021 lúc 22:10
a, 1dfrac{5}{18}+dfrac{7}{25}-dfrac{5}{18}+dfrac{18}{25}-0, 75b, dfrac{2}{5}.dfrac{1}{3}-dfrac{4}{3}.dfrac{2}{5}c, (dfrac{-1}{4}).( 6dfrac{2}{11}) + 3 dfrac{9}{11}.(dfrac{-1}{4})d, 4. (-dfrac{1}{2})^{3_{ }}-_{ }2. (dfrac{-1}{2})^2 + 3. (dfrac{-1}{2}) + 1e, dfrac{1}{6}-(dfrac{2}{3})^2 + dfrac{5}{18}f, (dfrac{4}{3}-dfrac{3}{2})^2- 2.|-dfrac{1}{9}| + (-dfrac{5}{18})
Đọc tiếp
a, 1\(\dfrac{5}{18}\)+\(\dfrac{7}{25}\)-\(\dfrac{5}{18}\)+\(\dfrac{18}{25}\)-0, 75
b, \(\dfrac{2}{5}\).\(\dfrac{1}{3}\)-\(\dfrac{4}{3}\).\(\dfrac{2}{5}\)
c, (\(\dfrac{-1}{4}\)).( 6\(\dfrac{2}{11}\)) + 3 \(\dfrac{9}{11}\).(\(\dfrac{-1}{4}\))
d, 4. (-\(\dfrac{1}{2}\))\(^{3_{ }}\)-\(_{ }\)2. (\(\dfrac{-1}{2}\))\(^2\) + 3. (\(\dfrac{-1}{2}\)) + 1
e, \(\dfrac{1}{6}\)-(\(\dfrac{2}{3}\))\(^2\) + \(\dfrac{5}{18}\)
f, (\(\dfrac{4}{3}\)-\(\dfrac{3}{2}\))\(^2\)- 2.|-\(\dfrac{1}{9}\)| + (-\(\dfrac{5}{18}\))
a) dfrac{2}{3}+dfrac{3}{4}.left(-dfrac{4}{9}right)
b) -dfrac{5}{7}.dfrac{31}{33}+-dfrac{5}{7}:dfrac{33}{2}
c) -dfrac{3}{5}.dfrac{13}{11} _ -dfrac{3}{5}.dfrac{2}{11}
Đọc tiếp
a) \(\dfrac{2}{3}\)+\(\dfrac{3}{4}\).\(\left(-\dfrac{4}{9}\right)\)
b) \(-\dfrac{5}{7}\).\(\dfrac{31}{33}\)+\(-\dfrac{5}{7}\):\(\dfrac{33}{2}\)
c) \(-\dfrac{3}{5}\).\(\dfrac{13}{11}\) _ \(-\dfrac{3}{5}\).\(\dfrac{2}{11}\)
tính
a,\(6\dfrac{4}{5}-\left(1\dfrac{2}{3}+3\dfrac{4}{5}\right)\)
b,\(7\dfrac{5}{9}-\left(2\dfrac{3}{4}+3\dfrac{5}{9}\right)\)
c,\(6\dfrac{7}{7}-\left(1\dfrac{3}{4}+2\dfrac{5}{7}\right)\)
Tìm x:
a) dfrac{11}{12} - (dfrac{2}{5} + dfrac{3}{4}x) dfrac{2}{3}
b) dfrac{-2}{5} + dfrac{5}{3} . (dfrac{3}{2} - dfrac{4}{15}x) dfrac{-7}{6}
c) dfrac{1}{2} + dfrac{3}{4}x dfrac{1}{4}
Đọc tiếp
Tìm x:
a) \(\dfrac{11}{12}\) - (\(\dfrac{2}{5}\) + \(\dfrac{3}{4}\)x) \(\dfrac{2}{3}\)
b) \(\dfrac{-2}{5}\) + \(\dfrac{5}{3}\) . (\(\dfrac{3}{2}\) - \(\dfrac{4}{15}\)x) = \(\dfrac{-7}{6}\)
c) \(\dfrac{1}{2}\) + \(\dfrac{3}{4}\)x = \(\dfrac{1}{4}\)