\(3\frac{1}{2}+4\frac{5}{7}-5\frac{5}{14}=\frac{7}{2}+\frac{33}{7}-\frac{75}{14}=\frac{49}{14}+\frac{66}{14}-\frac{75}{14}=\frac{40}{14}=\frac{20}{7}\)

#Fox

=20/7

Bạn chỉ giúp mk cách làm được ko ạ

20/7 nha

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

Kết quả = -1288/2223

R

` 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

=100/273 hả đk ???🤔🤔😵😵

\(\frac{7}{8}-\frac{7}{16}-\frac{11}{32}\)

= \(\frac{28}{32}-\frac{14}{32}-\frac{11}{32}\)

= \(\frac{28-14-11}{32}\)

= \(\frac{3}{32}\)

Đề : 7/8 - 7/16 - 11/32 = ?

Chọn MSC là 32 . Ta có phép tính : 28/32 - 14/32 - 11/32 = 3/32 

Tíc nha !

\(\frac{7}{8}-\frac{7}{16}-\frac{11}{32}=\frac{7}{16}-\frac{11}{32}=\frac{3}{32}=0,09375\)

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

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

= \(\dfrac{39}{20}\)

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

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

= \(\dfrac{7}{12}\)

31/2+45/7-55/14  ?

\(\dfrac{20}{7}\)

    31/2+45/7-55/14 
= 217/14+90/14-55/14
= 252/14
^{_{Rồi tự rút gọn(Nếu được)}}
 

dễ, nhưng phai giai dc câu nay  60% nhan x cong 2 phan 3 = 1 phan 3 nhan 6va 1 phan 3

dễ mà