`-(3/7 + 3/8) - ((-3)/8 + 4/7) `
`= -3/7 - 3/8 + 3/8 -4/7`
`= (- 3/8 + 3/8) - (3/7 +4/7)`
`= 0 - 1`
`= -1`
\(\frac37*\left(x-\frac{14}{9}\right)=-\frac{11}{7}*\left(x+\frac{14}{11}\right)\)
Câu 1: Tìm x ∈ Z, biết:
c) \(\left(\frac12+\frac13+\frac14+\cdots+\frac{1}{10}\right)\cdot x=\frac19+\frac28+\frac37+\cdots+\frac82+\frac91\)
Câu 2: Thực hiện phép tính:
d) \(\frac{1}{1\cdot2\cdot3\cdot4}+\frac{1}{2\cdot3\cdot4\cdot5}+\cdots+\frac{1}{2021\cdot2022\cdot2023\cdot2024}\)
tìm x :
\(\frac{5}{8}.8^{x+2}-\frac{3}{5}.8^x=\frac{5}{3}.8^{11}-\frac{3}{5}.8^9\)
a, \(\left(7+\frac{7}{5}-\frac{2}{3}\right)-\left(4+\frac{4}{5}+\frac{3}{8}\right)+\left(3-\frac{3}{5}+\frac{2}{3}+\frac{3}{8}\right)\)
b.\(-\frac{13}{25}.\frac{5}{32}.\left(\frac{25}{-13}\right).\left(-64\right)\)
c.\(\frac{7}{80}:\left(-1\frac{3}{4}\right)-\frac{2}{9}:\left(8-\frac{8}{3}\right)-\left(-\frac{5}{24}\right)\left(-\frac{10}{3}+2\frac{8}{15}\right)\)
t\(M=\frac{3}{8}-\frac{3}{10}+\frac{3}{11}+\frac{3}{12}phần-\frac{5}{8}+\frac{1}{2}-\frac{5}{11}-\frac{5}{12}\)
5$-\frac{5}{3}+\frac{5}{9}-\frac{5}{27}$ \(8-\dfrac{8}{3}+\dfrac{8}{9}-\dfrac{8}{27}\) trên nhau nha
\(\left(\frac{3}{8}-\frac{1}{5}-\frac{1}{3}\right)+\left(\frac{5}{8}-\frac{10}{7}-\frac{4}{7}\right)+\frac{1}{3}\)
Thực hiện phép tính
\(\frac{\frac{3}{7}-\frac{3}{28}-\frac{3}{56}}{\frac{-3}{2}+\frac{3}{8} +\frac{3}{16}}-\frac{\frac{3}{6}-\left(-\frac{3}{36}\right)+\frac{3}{72}}{\frac{-9}{8}-\frac{9}{48}-\frac{9}{96}}+1\frac{59}{60}+0,01\left(6\right)\)
1/Tính
a) \(\left(\frac{7}{2}+\frac{17}{3}\right).\frac{8}{19}-\left(\frac{5}{2}+\frac{14}{3}\right).\frac{8}{19}\)
b)\(\frac{3^{2014}.8^{19}}{6^{60}.3^{1955}}\)
\(\frac{\frac{3}{8}-\frac{3}{10}+\frac{3}{11}+\frac{3}{12}}{\frac{-5}{6}+\frac{5}{10}+\frac{5}{11}+\frac{5}{12}}+\frac{\frac{3}{2}+1+\frac{3}{4}}{\frac{5}{2}+\frac{5}{3}+\frac{5}{4}}\)
-5/6 là -5/8
Tính nhanh
