\(\frac{17}{8}+\frac{28}{15}-\frac{8}{15}=\frac{17}{8}+\frac{4}{3}=\frac{83}{24}=3\frac{11}{24}\)

=> chọn a

Đáp án : a) 311/24

câu a : 

\(\dfrac{-8}{24}+\dfrac{-4}{12}=\dfrac{-1}{3}+\dfrac{-1}{3}=\dfrac{-2}{3}\)

câu b : 

\(\dfrac{-20}{35}+\dfrac{16}{24}=\dfrac{-4}{7}+\dfrac{2}{3}=\dfrac{2}{21}\)

câu c : 

\(\dfrac{-3}{9}+\dfrac{-6}{15}=\dfrac{-1}{3}+\dfrac{-2}{5}=\dfrac{-11}{15}\)

câu d : 

\(\dfrac{3}{13}-\dfrac{4}{10}=\dfrac{3}{13}-\dfrac{2}{5}=\dfrac{-11}{65}\)

câu e : 

\(\dfrac{5}{17}-\dfrac{9}{15}=\dfrac{5}{17}-\dfrac{3}{5}=\dfrac{-26}{85}\)

câu g : 

\(\dfrac{9}{18}-\dfrac{6}{15}+\dfrac{3}{-9}=\dfrac{9}{18}-\dfrac{6}{15}+\dfrac{-3}{9}\\ =\dfrac{1}{2}-\dfrac{2}{5}+\dfrac{-1}{3}=\dfrac{-7}{30}\)

câu h : 

\(\dfrac{5}{4}-\dfrac{1}{2}+\dfrac{-7}{8}=\dfrac{10}{8}-\dfrac{4}{8}+\dfrac{-7}{8}=\dfrac{-1}{8}\)

`#3107.101107`

`(24*15 + 15)/(8*3+1)`

`= (15* (24+1))/(24 + 1)`

`= (15*25)/25`

`= 15/1`

`=15`

-6/15:-5/3

-6/15.-3/5

18/75

Đúng thì nha

= -6/15:-8/3.15/24

=-2/5:-8/3.5/8

=3/20.5/8

=3/32

-6/15 : -8/3 . 15/24

= -2/5 : -8/3 . 5/8

= 3/20 . 5/8

= 3/32

\(b=\text{​​}\dfrac{15.2^{24}.3^{14}-4.3^{15}.2^{24}}{19.2^{24}.3^{14}-6.2^{24}.3^{15}}=\)

\(=\dfrac{2^{24}.3^{14}\left(15-4.3\right)}{2^{24}.3^{14}\left(19-6.3\right)}=3\)

\(\text{24) 15 (4-7)- 15 (5-3)}\)

\(=15.\left[\left(4-7\right)-\left(5-3\right)\right]\)

\(=15.\left[4-7-5+3\right]\)

\(=15.\left(-5\right)\)

\(=-75\)

\(\text{25) 73(8-59) -59(8-73)}\)

\(=73.8-73.59-59.8+59.73\)

\(=8\left(73-59\right)+59\left(-73+73\right)\)

\(=8.14+59.0\)

\(=112\)

24) 15 (4-7)- 15 (5-3)

=15. 4 − 7 − 5 − 3

= 15. 4 − 7 − 5 + 3

= 15. −5

= −75

25) 73(8-59) -59(8-73)

= 73.8 − 73.59 − 59.8 + 59.73

= 8 73 − 59 + 59 −73 + 73

= 8.14 + 59.0

= 112

15 (4-7)- 15 (5-3)

=15. 4 − 7 − 5 − 3

= 15. 4 − 7 − 5 + 3

= 15. −5

= −75

25) 73(8-59) -59(8-73)

= 73.8 − 73.59 − 59.8 + 59.73

= 8 73 − 59 + 59 −73 + 73

a)9/8

b)1/12

a)7/8 + 1 - 3/4

= 7/8 + 8/8- 6/8

=9/8

b) 15/24 - 3/8 - 1/6

=15/8 - 9/24 - 4/24

=2/24=1/12

a)7/8 + 1 - 3/4

= 7/8 + 8/8- 6/8

=9/8

b) 15/24 - 3/8 - 1/6

=15/8 - 9/24 - 4/24

=2/24=1/12

giúp với

Ý đề bài bạn có phải là thế này ko?

\(\dfrac{7^{80}}{\left(-13^4\right)}-\dfrac{2^9}{\left(8-8^3\right)}--5^{24}.\left(-10^3+28^{15}\right)^2\)