-13 + ( -19)

= - (13 + 19)

=-32

=-32 nhé

chúc bn hoc gioi

(-13)+(-19)

= - (13+19)

= - 32

27-(-14)

=27+14

=41

27-(-14)

=27+14

=41

27-(-14)

=27+14

=41

\(=200-100:5+1\)

\(=200-20+1\)

=\(180+1\)

\(=181\)

181

17+5(-17)

=17.1+5(-17)

=-17.(-1)+5.(-17)

=-17.(-1+5)

=-17.4

=-68

k nah...^_^...kb nữa!!!

17 + 5(-17)

= 17 + (-5) . 17

= 17 . [(-5 + 1]

= 17 . (-4)

= -68

ta có : 17 + 5 (-17)

        = 17+(-5)17

        = 17(-5+1)

        = 17(-4)

        =-(17*4)

        =-68

Năm mới chúc bạn vui vẻ!

( -85 ) . 13 + 85 . 13

=13 ( -85 + 85)

=13.0

=0

(-85) . 13 + 85 . 113

= 85 . (-13) + 85 . 113

= 85 . [(-13) + 113]

= 85 . 100

= 8500

(-85).13+85.113

=85. (-13)+85.113

=85. [(-13)+113]

=85.100

=8500

k mk nha

c: \(=\left(\dfrac{3}{5}+\dfrac{83}{200}-\dfrac{3}{200}\right)\cdot\dfrac{8}{3}\cdot\dfrac{1}{4}=\dfrac{8}{3}\cdot\dfrac{1}{4}=\dfrac{2}{3}\)

g: \(=\dfrac{1}{2}\cdot\dfrac{4}{3}\cdot\dfrac{3}{4}\cdot\dfrac{5}{2}+\dfrac{3}{5}=\dfrac{5}{4}+\dfrac{3}{5}=\dfrac{25+12}{20}=\dfrac{37}{20}\)

c) = 2/3

g) = 37/20 = 1,85

n) = 3/17

e: \(=\dfrac{21-6}{8}\cdot\dfrac{16}{3}=\dfrac{15}{3}\cdot2=10\)

f: \(=\dfrac{-3\cdot3+7\cdot4}{12}:\dfrac{2\cdot2-5\cdot9}{18}\)

\(=\dfrac{19}{12}\cdot\dfrac{18}{-41}=\dfrac{-57}{82}\)

g: \(=\dfrac{9-8}{10}\cdot\dfrac{5}{2}+1=\dfrac{1}{10}\cdot\dfrac{5}{2}+1=\dfrac{1}{4}+1=\dfrac{5}{4}\)

o: \(=\dfrac{3}{4}\cdot\left[\dfrac{1}{5}-\dfrac{4}{7}-\dfrac{3}{5}\cdot\dfrac{-5}{7}\right]=\dfrac{3}{4}\cdot\left(\dfrac{1}{5}-\dfrac{4}{7}+\dfrac{3}{7}\right)\)

\(=\dfrac{3}{4}\cdot\left(\dfrac{1}{5}-\dfrac{1}{7}\right)=\dfrac{3}{4}\cdot\dfrac{2}{35}=\dfrac{3}{70}\)

p: \(=\left[\left(\dfrac{1}{9}\cdot\dfrac{27}{8}\right)\cdot3\right]\cdot\dfrac{-128}{81}=\dfrac{9}{8}\cdot\dfrac{-128}{81}=\dfrac{-16}{9}\)