Câu 1:
\(=\dfrac{15}{34}+\dfrac{19}{34}-1-\dfrac{15}{17}+\dfrac{1}{3}+\dfrac{3}{5}\)
\(=-\dfrac{15}{17}+\dfrac{14}{15}=\dfrac{13}{255}\)
Câu 2:
\(=\dfrac{5^4\cdot5^4\cdot2^8}{4^4\cdot6^4\cdot3^2\cdot5}=\dfrac{5^7}{6^4\cdot3^2}\)
Bài 1: Tính
\(\dfrac{1}{2}-\left(\dfrac{-16}{17}\right)+\dfrac{4}{5}-\left(\dfrac{-4}{9}\right)+\dfrac{11}{45}+\dfrac{19}{34}+\dfrac{19}{105}\)
BT1: Tính nhanh:
1) \(\dfrac{1}{2}-\left(\dfrac{-16}{17}\right)+\dfrac{4}{5}-\left(\dfrac{-4}{9}\right)-\dfrac{11}{45}+\dfrac{19}{34}+\dfrac{19}{105}\)
Tính nhanh :A=\(\dfrac{15}{34}+\dfrac{7}{21}+\dfrac{9}{34}-1\dfrac{15}{17}+\dfrac{2}{3}\)
a) \(1\dfrac{4}{23}+\dfrac{5}{21}\dfrac{4}{23}+0,5+\dfrac{16}{21}\)
b)\(\dfrac{3}{7}.19\dfrac{1}{3}-\dfrac{3}{7}.33\dfrac{1}{3}\)
c)\(15\dfrac{1}{4}:\left(-\dfrac{5}{7}\right)-25\dfrac{1}{4}:\left(-\dfrac{5}{7}\right)\)
d)\(\left(-\dfrac{2}{3}+\dfrac{3}{7}\right):\dfrac{4}{5}+\left(\dfrac{-1}{3}+\dfrac{4}{7}\right):\dfrac{4}{5}\)
Làm giúp em với ạ
\(M=\dfrac{\left(\dfrac{3}{10}-\dfrac{4}{15}-\dfrac{7}{20}\right)•\dfrac{5}{19}}{\left(\dfrac{1}{17}+\dfrac{1}{7}-\dfrac{-3}{35}\right)•\dfrac{-4}{35}}\)
Tính Nhanh Nha Mọi người
\(\dfrac{4}{9}.19\dfrac{1}{3}+\dfrac{-4}{9}.39\dfrac{1}{3}+\dfrac{-3^2}{5}:\left(-0,2\right)\)
\(\dfrac{\left(-5^3\right)^2}{27}.\dfrac{3}{23}.\dfrac{6^2}{-5^6}\)
\(1\dfrac{4}{23}+\dfrac{5}{21}-\dfrac{4}{23}+0,5+\dfrac{16}{21}\)
\(\dfrac{3}{7}.19\dfrac{1}{3}-\dfrac{3}{7}:33\dfrac{1}{3}\)
\(\dfrac{3}{4}-\left(x+\dfrac{1}{2}\right)=\dfrac{4}{5}\)
x:(-2,14)=(-3,12):1,2
1, tính
a, 25 + 8 [(-2)3 : \(\dfrac{1}{2}\)]0 - (\(\dfrac{1}{2}\))3 . 2 + (-2)3
b, \(\dfrac{7}{15}-\dfrac{9}{19}-\dfrac{-8}{15}-\dfrac{10}{19}\)
c, \(1\dfrac{1}{3}\div\dfrac{4}{5}+2\dfrac{2}{3}\div\dfrac{4}{5}\)
\(\dfrac{-3}{5}+\dfrac{7}{21}+\dfrac{-4}{5}+\dfrac{7}{5}\)
\(\dfrac{-3}{17}+(\dfrac{2}{3}+\dfrac{3}{17})\)
Tính giá trị biểu thức :
A=\(\left[\dfrac{1\dfrac{11}{31}.4\dfrac{3}{7}-\left(15-6\dfrac{1}{3}.\dfrac{2}{19}\right)}{4\dfrac{5}{6}+\dfrac{1}{6}\left(12-5\dfrac{1}{3}\right)}\right].\dfrac{31}{50}\)
