Câu 1: Thực hiện phép tính bằng cách hợp lí

\(\frac{15}{35}+\frac{7}{21}+\frac{19}{34}-1\frac{15}{17}+\frac{2}{3}\)

\(\left(-2\right)^3.\left(\frac{3}{4}-0,25\right):\left(2\frac{1}{4}-1\frac{1}{6}\right)\)

\(16\frac{2}{7}:\left(-\frac{3}{5}\right)+28\frac{2}{7}:\left(-\frac{3}{5}\right)\)

Câu 2: Tìm x biết

\(2.x-\frac{5}{4}=\frac{20}{15}\)

\(1,5:0,3=x:-15\)

\(|2x-1|=2\)

Câu 3: Thực hiện phép tính hợp lí

\(\frac{11}{12}.\frac{15}{33}+\frac{11}{12}.\frac{2}{22}\)

\(3/3\frac{1}{8}.11\frac{17}{19}-3\frac{1}{8}.13\frac{17}{19}\)

\(28\frac{2}{7}:\left(-\frac{3}{5}\right)+16\frac{2}{7}:\left(-\frac{3}{5}\right)\)

a,\(\frac{15}{34}\)+\(\frac{7}{21}\)+\(\frac{19}{34}\)-\(\frac{19}{35}1\)+\(\frac{2}{3}\)

b,(2,5)\(^3\).(-2)\(^3\)+2496\(^5\):(-832)\(^5\)-98\(^{17}\):(98)\(^{16}\)

c,\(\frac{3}{4}\).\(\frac{1}{5}26\)-\(\frac{3}{4}\).\(\frac{1}{5}44\)

d,(-2)\(^3\).(\(\frac{3}{4}\)-0,25):(\(\frac{1}{4}2\)-\(\frac{1}{6}1\))

e,\(\frac{1}{7}\).\(\frac{-3}{8}\)+\(\frac{-13}{8}\).\(\frac{1}{7}\)

f,9.(\(\frac{1}{3}\))\(^3\):[(\(\frac{-2}{3}\))\(^2\)+0,5-\(\frac{1}{2}1\)]

Bài 1: Thực hiện phép tính( bằng cahcs hợp lí nếu có thể)

\(a)\frac{7}{25}+\frac{4}{13}-\frac{5}{2}+\frac{18}{25}-1\frac{4}{13}\)

\(b)12-8.\left(\frac{3}{2}\right)^3\)

\(c)100\times\sqrt{0,04}+\sqrt{\frac{25}{16}}\)

\(d)\frac{1}{4}+\frac{3}{4}.\frac{5}{6}\)

\(e)3,75.7,2+2,8.3,75\)

\(f)\frac{1}{2}\sqrt{4}-\sqrt{25}\)

\(g)(\frac{1}{9})^{2005}.9^{2005}-96^2:24^2\)

\(h)\frac{15}{34}+\frac{7}{21}+\frac{19}{34}-\frac{20}{15}+\frac{3}{7}\)

\(k)\left(-3,5\right).\left(-7,2\right)+\left(-3,15\right).12,4+4,8.\left(-3,15\right)\)

\(l)16\frac{2}{7}:\left(-\frac{2}{5}\right)-28\frac{2}{7}:\left(-\frac{2}{5}\right)\)

\(m)\left(-\frac{1}{2}\right)^3+\frac{1}{2}:5\)

\(n)1\frac{1}{23}+\frac{2}{21}-\frac{1}{23}+\frac{19}{21}+2013^0\)

\(h)\frac{-5}{9}.\left(\frac{3}{10}-\frac{2}{5}\right)\)

\(i)\frac{1}{2}\sqrt{64}-\sqrt{\frac{4}{25}+1^{2012}}\)

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Bài 1:Thực hiện phép tính

a, 0,5-\(\frac{5}{41}\)+\(\frac{1}{2}\)-\(\frac{36}{41}\)

b,(-\(\frac{1}{3}\))².\(\frac{4}{11}\)+\(\frac{7}{11}\).(\(\frac{1}{3}\))²

c,(-\(\frac{2}{3}\)+\(\frac{3}{7}\)):\(\frac{4}{5}\)+(-\(\frac{1}{3}\)+\(\frac{4}{7}\)):\(\frac{4}{5}\)

d,\(\frac{48^2.8^5.100^9}{12^2.2^{15}.4^2}\)

e,(-2)³ -\(\sqrt{0,36}\) - |-2,4|

f,|-\(\frac{3}{4}\)|.\(\sqrt{\frac{16}{9}}\)+ 3\(\sqrt{49}\)

thực hiện phép tính (hợp lí nếu có thể):

a) 1\(\frac{4}{23}\)+\(\frac{5}{21}\)- \(\frac{4}{23}\)+ 0,5 + \(\frac{16}{21}\)

b) \(\frac{3}{7}\).  19\(\frac{1}{3}\)- \(\frac{3}{7}\). 33\(\frac{1}{3}\)

c) 9 . (-\(\frac{1}{3}\))\(^3\)+ \(\frac{1}{3}\)

d) 15\(\frac{1}{4}\): (-\(\frac{5}{7}\)) - 25\(\frac{1}{4}\): (-\(\frac{5}{7}\))

1.Thực hiện phép tính:   a)\(\frac{-3}{5}\)+\(\frac{28}{5}\)\(\left(\frac{43}{56}+\frac{5}{24}-\frac{21}{63}\right)\)b)\(\frac{5}{7}\)\(\times\)\(\frac{11}{18}\)+\(\frac{3}{7}\)\(\times\)\(\frac{5}{18}\)+\(\frac{4}{9}\) c)\(\frac{-3}{4}\)\(\times\)\(5\frac{3}{13}\)-0,75\(\times\)\(\frac{36}{13}\)d)\(6\frac{5}{12}\):\(2\frac{3}{4}\)-\(11\frac{1}{4}\times\left(\frac{1}{3}-\frac{1}{5}\right)\)

e) \(\left(\frac{3}{5}+0,415-\frac{3}{200}\right).2\frac{2}{3}.0,25\)

A=\(\frac{15}{34}+\frac{7}{21}+\frac{9}{34}-1\frac{15}{17}+\frac{2}{3}\)

B=\(16\frac{2}{7}:\left(-\frac{3}{5}\right)-28\frac{2}{7}:\left(-\frac{3}{5}\right)\)

C=\(25\cdot\left(-\frac{1}{3}\right)^3+\frac{1}{5}-2\cdot\left(-\frac{1}{2}\right)^2-\frac{1}{2}\)

D=\(\left(-2\right)^3\cdot\left(\frac{3}{4}-0,25\right):\left(2\frac{1}{4}-1\frac{1}{6}\right)\)

E=\(5\sqrt{16}-4\sqrt{9}+\sqrt{25}-0,3\sqrt{400}\)

F=\(\left(-\frac{3}{2}\right)^2+|-\frac{5}{6}|-1\frac{1}{2}:6\)

Thực hiện phép tính ( bằng cách hợp lí có thể ) 

a) \(\frac{15}{34}\)+ \(\frac{7}{21}\)+ \(\frac{19}{34}\)- \(\frac{20}{15}\)+ \(\frac{3}{7}\)

b) 16\(\frac{2}{7}\): \(\left(\frac{-3}{5}\right)\)-28\(\frac{2}{7}\):\(\left(\frac{-3}{5}\right)\)

c)2\(\frac{1}{2}\)+ \(\frac{4}{7}\): \(\left(\frac{-8}{9}\right)\) 

d) 6-3.\(\left(\frac{-1}{3}\right)\)^3

Thực hiện phép tính:  [Làm được bao nhiêu câu cũng được,mình cảm ơn]

A=\(\frac{7}{15}\)-\(\frac{3}{2}\).\(\frac{-4}{5}+\frac{-1}{5}\)

B=[(\(\frac{-2}{3}\))\(^2\)+(\(\frac{1}{2}\))\(^3\)] :\(\frac{41}{27}\)

C=(\(\frac{-3}{4}\)+\(\frac{2}{3}\)) :\(\frac{5}{14}\)+ (\(\frac{-1}{4}+\frac{1}{3}\)) : \(\frac{5}{11}\)