\(\frac{3}{4}\cdot26\frac{1}{5}-\frac{3}{4}\cdot44\frac{1}{5}\)
\(=\frac{3}{4}\cdot\frac{131}{5}-\frac{3}{4}\cdot\frac{221}{5}\)
\(=\frac{3}{4}\cdot\left(\frac{131}{5}-\frac{221}{5}\right)\)
\(=\frac{3}{4}\cdot\left(-18\right)\)
\(=-\frac{27}{2}\)
\(\frac{-3}{4}.26\frac{1}{5}+\frac{3}{4}.44\frac{1}{5}\)
Thực hiên các phép tính (bằng cách hợp lý ,nếu có thể)
a\(\left(\frac{3}{7}-\frac{5}{2}-\frac{3}{5}\right)-\left(-\frac{4}{7}-\frac{3}{2}+\frac{2}{5}\right)\) c)\(\left(-\frac{1}{2}\right)^2:\frac{1}{4}-2.\left(\frac{-1}{2}\right)^3\) e)\(\frac{2^9.4^{10}}{8^8}\)
b\(\left(\frac{2}{5}\right)^2+5\frac{1}{2}.\left(4,5-2\right)+\frac{2^3}{\left(-4\right)}\) d)\(\sqrt{16}.1\frac{3}{4}+\frac{1}{4}-7\) f)\(\frac{3}{4}.26\frac{1}{5}-\frac{3}{4}.44\frac{1}{5}\)
Tính giá trị của các biểu thức sau:
\(A=\frac{\frac{3}{4}-\frac{3}{26}+\frac{3}{17}+\frac{3}{11}}{\frac{7}{4}-\frac{7}{26}+\frac{7}{1}+\frac{7}{11}}:\frac{\frac{5}{6}+\frac{5}{9}-\frac{5}{12}}{\frac{7}{3}+\frac{14}{9}-\frac{7}{6}}\)
\(B=\frac{1}{4.9}+\frac{1}{9.14}+\frac{1}{14.19}+.........+\frac{1}{34.39}\)
\(C=\frac{1}{99}-\frac{1}{99.98}-\frac{1}{98.97}-\frac{1}{97.96}-........-\frac{1}{3.2}-\frac{1}{2.1}\)
Tính hợp lý
\(\frac{3}{5}+\frac{3}{11}-\left(\frac{-3}{7}\right)+\left(\frac{2}{97}\right)-\frac{1}{35}-\frac{3}{4}+\left(\frac{-23}{44}\right)\)
Bài 1: Tính
a)\(\left(\frac{9}{25}-2\cdot18\right):\left(3\frac{4}{5}+0,2\right)\)
b)\(\frac{3}{8}\cdot19\frac{1}{3}-\frac{3}{8}\cdot33\frac{1}{3}\)
c)\(1\frac{4}{23}+\frac{5}{21}-\frac{4}{23}+0,5+\frac{16}{21}\)
d)\(\frac{21}{47}+\frac{9}{45}+\frac{26}{47}+\frac{4}{5}\)
LÀM NHANH GIÚP MIK ,MIK TICK CHO Ạ
Bài 1:Tính
\(\frac{\frac{1}{3}-\frac{4}{5}}{\frac{1}{3}+\frac{4}{5}}.\frac{\frac{3}{4}-\frac{5}{3}}{\frac{3}{4}+\frac{5}{3}}:\frac{\frac{4}{5}-1}{1-\frac{2}{3}}\)
Tính hợp lí:
a)\(\left(\frac{-1}{2}\right)-\left(\frac{-3}{5}\right)+\left(\frac{-1}{9}\right)+\frac{1}{127}\)\(-\left(+\frac{7}{18}\right)+\frac{4}{35}-\left(\frac{-2}{7}\right)\)
b)\(\frac{3}{5}+\frac{3}{11}-\left(\frac{-3}{7}\right)+\)\(\left(\frac{2}{97}\right)-\frac{1}{35}-\frac{3}{4}+\left(\frac{-23}{44}\right)\)
Bài 1:
a) \(26\frac{1}{7}:\left(-\frac{3}{4}\right)-44\frac{1}{7}:\left(-\frac{3}{4}\right)\)
b) \(10.\sqrt{0,01}-\left(-\frac{1}{2}\right)^3-\frac{1}{2}.\sqrt{4}+0,25\)
Tính:
\(\left(\frac{1}{4\cdot9}+\frac{1}{9\cdot14}+\frac{1}{14\cdot19}+...+\frac{1}{44\cdot49}\right)\cdot\frac{1-3-5-7-...-49}{89}\)
