3/4+-5/12+6/24

=18/24-10/24+6/24=14/24=7/12

\(\dfrac{3}{4}+\left(-\dfrac{5}{12}\right)+\dfrac{6}{24}=\dfrac{18}{24}+\dfrac{-10}{24}+\dfrac{6}{24}=\dfrac{14}{24}=\dfrac{7}{12}\)

` 5/9 . ( -2/13)+5/9.(-7/13)+(-8/13) = 5/9(-2/13-7/13)-8/13=5/9.(-9/13)-8/13=-5/13-8/13=-13/13=-1 `

GHI ra phân số đc ko

mình đây

a11.62+(-12).11+50.11

=11.(62+(-12)+50)

=11.(50+50)

11.100=1100

b5/13+-5/7+-20/41+8/13+21/41

=(5/13+8/13)+(-20/41+21/41)+-5/7

=1+1/41+-5/7

=89/287

nhớ tích đúng nha

a, 11.62+(-12).11+50.11

= 11.[62+(-12)+50]

= 11.100 = 1100

b, 5/13 + -5/7 + -20/41 + 8/13 + 21/41

= ( 5/13 + 8/13 ) + [ -20/41 + 21/41 ] + -5/7

= 1 + 1/41 + -5/7

= 89/287

\(\frac{1}{2}+-\frac{1}{5}+-\frac{5}{7}+\frac{1}{6}-\frac{3}{35}+\frac{1}{3}+\frac{1}{41}=\frac{1}{41}\)

1/41 giai ra dai nam cu rut gon roi quy dong

a; \(\dfrac{3}{5}\) - \(\dfrac{-7}{10}\) - \(\dfrac{13}{-20}\)

= \(\dfrac{12}{20}\) +  \(\dfrac{14}{20}\) + \(\dfrac{13}{20}\)

= \(\dfrac{39}{20}\)

b; \(\dfrac{1}{2}\) + \(\dfrac{1}{-3}\) + \(\dfrac{1}{4}\) - \(\dfrac{-1}{6}\)

= \(\dfrac{6}{12}\) - \(\dfrac{4}{12}\) + \(\dfrac{3}{12}\) + \(\dfrac{2}{12}\)

= \(\dfrac{7}{12}\)

có phải đề là:

\(\frac{1}{2}\)+\(\frac{2}{3}\)+\(\frac{3}{4}\)+\(\frac{4}{5}\)+\(\frac{3.99}{100}\)không bạn

I Love you mik nghĩ bn nên đọc kĩ đề hơn .Cộng 3 chấm là cộng ... mà chứ k phải 3.99

\(\frac{7}{13}.\frac{5}{9}+\frac{7}{19}.\frac{8}{13}-3.\frac{7}{19}=\)\(\frac{-1288}{2223}\)

Kết quả = -1288/2223

a)  5 7

b)  - 3 5

c)  11 15

d)  16 3