1 . tính 

a ) 300 + 40 +0,05                            b) 50 +0,6 +0,07

c ) 200+6  + \(\frac{3}{100}\)                             d) 27 + \(\frac{4}{10}+\frac{6}{100}\)

2 >,< ,= 

 \(3\frac{2}{5}\) ....... 3,25                                    \(4\frac{1}{20}\)  ............ 4,2 

21,09 ......... \(21\frac{1}{10}\)                            \(8\frac{7}{20}\) ................. 8,35

a, Tính : \(\frac{\left(13\frac{1}{4}-2\frac{5}{27}-10\frac{5}{6}\right).230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{10}+\frac{10}{3}\right):\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)

b, Tính : \(P=\frac{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{2012}}{\frac{2011}{1}+\frac{2010}{2}+\frac{2009}{3}+...+\frac{1}{2011}}\)

c, Tính : \(\frac{\left(1+2+3+...+99+100\right)\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{7}-\frac{1}{9}\right)\left(63.1,2-21.3,6\right)}{1-2+3-4+...+99-100}\)

Tính:

a.A =  \(\frac{\left(13\frac{1}{4}-2\frac{5}{27}-10\frac{5}{6}\right).230\frac{1}{25}+46\frac{3}{4}}{\left(1\frac{3}{10}+\frac{10}{3}\right):\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)

b. B = \(\frac{\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{2012}}{\frac{2011}{1}+\frac{2010}{2}+\frac{2009}{3}+...+\frac{1}{2011}}\)

c. C = \(\frac{\left(1+2+3+...+99+100\right).\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{7}-\frac{1}{9}\right).\left(63.1,2-21.3,6\right)}{1-2+3-4+...+99-100}\)

Tính:

a) \(\frac{\frac{3}{5}+\frac{3}{27}-\frac{3}{9}-\frac{3}{11}}{\frac{4}{5}+\frac{4}{27}-\frac{4}{9}-\frac{4}{11}}\)

b) \(\frac{5-\frac{5}{3}-\frac{5}{27}}{8-\frac{8}{3}-\frac{8}{27}}:\frac{15+\frac{15}{121}-\frac{15}{11}}{16+\frac{16}{121}-\frac{16}{11}}\)

c) \(\frac{1}{2}:\left(\frac{-3}{2}\right):\frac{4}{3}:\left(\frac{-5}{4}\right):\frac{6}{5}:\left(\frac{-7}{6}\right):...:\left(\frac{-101}{100}\right)\)

Mọi người nhớ đánh nhanh câu trả lời giúp mình nhé!!

1 Tính

A = 1+5²⁺5^{4+....................+}5^{200    ,                        B =} 3-3²⁺3³-3⁴+.....................+3⁹⁹-3¹⁰⁰

C  = \(\frac{1}{7}+\frac{1}{7^2}+.................+\frac{1}{7^{100}}\)

D = \(-\frac{4}{5}+\frac{4}{5^2}-\frac{4}{5^3}+..................+\frac{4}{5^{200}}\)

E = 6³+6⁴+..............................+6¹⁵⁰