số nguyên:

15 - ( -15 + 2)=

(-14) - (17 - 8)=

15 - ( 21- 7)=

34 + (-15) - 17=

(-34) + ( -12) + 18=

27 - 15 - 19=

34 - ( -15) +8=

-37 + 13 - 25=

40 - 17 + ( -25)=

16 + (-15 ) - 18=

15 - 14 - 13=

-27 + 15 -17=

34 - 71=

28 - 125=

13 + ( -27)=

14 - (-34)=

28 - (-16)=

-15 -8 =

-27 -34=

-25 - (-18)=

46 - 25 - (-25)=

-37 - (-24)=

46 - (-15)=

-26 - 6 + 7 =

tính

\(\dfrac{-5}{8}:\dfrac{15}{4}\) \(\dfrac{-15}{17}:\dfrac{25}{-34}\) \(-48:(\dfrac{-24}{5})\) \(\dfrac{-30}{7}:(\dfrac{-5}{-14})\)

\(\dfrac{15}{28}:(\dfrac{-9}{14})\) \(\dfrac{-7}{40}:(-\dfrac{21}{20})\) \((\dfrac{-4}{15}).(-\dfrac{-25}{8})\) \(\dfrac{5}{-14}.(-\dfrac{7}{10})\)

\(\dfrac{-15}{4}.(-\dfrac{16}{25})\) \(15.(-\dfrac{13}{10})\) \((-\dfrac{14}{5}).-10\) \((\dfrac{3}{-10}).(-\dfrac{-15}{2})\)

Tính:

A = ( \(2^{17}\) + \(17^2\) ) . ( \(9^{15}\) - \(3^{15}\) ) . ( \(2^4\) -\(4^2\) ) 

B= \(\frac{2^{13}+2^5}{2^{10}+2^2}\)

C = \(\left(1^2+2^2+2^3+........+2020\right)^2.\left(65.111-13.15.37\right)\)

 D = \(\frac{1+2+3+.....+2020}{6+8+10+........+54}\)

E = \(\frac{25^{28}+25^{24}+25^{20}+.....+25^4+1}{25^{30}+25^{28}+25^{26}+.....+25^2+1}\)

a, 25 - ( -76 ) - 725 + 224

b, -3 . 15 + 15 ( -12 ) - 15 . 85

c, \(\frac{-11}{12}\). \(\frac{-4}{33}\). \(\frac{84}{-25}\). \(\frac{-5}{6}\)

d, 17. 215 - 117 . 215 - 17 . 15 + 117 . 15

e. 35 . ( -32) . 123 . ( -25)

f. \(3\frac{2}{7}\) . \(12\frac{1}{2}\)- \(3\frac{2}{7}\).. \(5\frac{1}{2}\)

g. \(\frac{7,5.6,3.0,4}{0,8.2,5.12,6}\)

h. \(\frac{0,4-\frac{2}{9}+\frac{2}{11}}{1,4-\frac{7}{9}+\frac{7}{11}}\)