So sánh

a,\(\left(-32\right)\)\(^9\)và \(\left(-16\right)\)\(^{13}\)

b,\(\left(-5\right)\)\(^{30}\)và \(\left(-3\right)\)\(^{50}\)

c,\(\left(-32\right)\)\(^9\)và \(\left(-18\right)\)\(^{13}\)

d, \(\left(\frac{-1}{16}\right)\)và \(\left(\frac{-1}{2}\right)\)

Bài 1: Tính

a\()\) \(\frac{-25}{28}\) \(\times\) \(0,21\)

b\()\) \((\frac{13}{24}-\frac{29}{30})\) \(\div\) \(\left(-10,2\right)\)

Bài 2: Tìm x

a\()\) \(\left|x\right|\) \(=\) \(\frac{10}{3}\) b\()\) \(\left|x\right|\) \(=\) \(-5,1\)

c\()\) \(\left|x-\frac{11}{6}\right|\) \(=\) \(0\) d\()\) \(\left|x-\frac{5}{6}\right|\) \(=\) \(\frac{1}{2}\)

e\()\) \(\left|x+\frac{4}{9}\right|\) \(-\) \(\frac{1}{2}\) \(=\) \(\frac{3}{2}\)

Bài 3: Tìm giá trị nhỏ nhất \(\left|2x-1\right|+9\)

Bài 4: Tìm giá trị lớn nhất \(\frac{1}{8}-\left|x+3\right|\)

So sánh

a)\(\frac{-2002}{2003}\)và \(\frac{-2005}{2004}\)

b)\(\frac{-1}{10^5}\)và \(\frac{-9}{-10}\)

c)\(\frac{22}{29}\)và\(\frac{24}{27}\)

d)\(\left(0.4\right)^4\)và \(\left(0.8\right)^4\)

e)\(2^{300}\)và \(3^{200}\)

f)\(77^{30}\)và\(7777^{15}\)

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

Bỏ ngoặc rồi tính :

a, \(\frac{6}{7}\) + \(\left(\frac{2}{11}-\frac{6}{7}\right)\)- \(\left(\frac{13}{11}+1\right)\)

b, \(\frac{-5}{11}\)- \(\left(\frac{17}{19}-\frac{5}{11}\right)\)- \(\left(\frac{17}{19}-2\right)\)

c, \(-\left(\frac{11}{14}-\frac{8}{9}\right)\)+ \(\left(\frac{-3}{14}-\frac{8}{19}\right)\)

d, \(\frac{3}{2}\) - \(\left[\left(\frac{-4}{7}\right)-\left(\frac{1}{2}+\frac{5}{8}\right)\right]\)

tính:

a,(2\(^{-1}\)+3\(^{-1}\)):(2\(^{-1}\)- 3\(^{-1}\))+(2\(^{-1}\).2\(^0\)):\(2^3\)

b, \(\left(\frac{-1}{3}\right)\)\(^{-1}\)- \(\left(-\frac{6}{7}\right)\)\(^0\)+\(\left(\frac{1}{2}\right)\)\(^2\):2

Thu gọn các đơn thức trong biểu thức đại số :

a) C=\(\frac{7}{9}\)x\(^3\)y\(^2\). \(\left(\frac{6}{11}axy^3\right)\)+ (-5bx\(^2\)y\(^4\)) (-\(\frac{1}{2}\)axz ) + ax (x\(^2\)y)\(^3\)

b) D = \(\frac{\left(3x^4y^4\right)^2.\left(\frac{6}{11}x^3y\right).\left(8x^{n-7}\right).\left(-2x^{7-n}\right)}{15x^3y^2.\left(0,4ax^2y^2z^2\right)^2}\)( vs axyz \(\ne\)0 )