nhìn cách làm thì có vẻ em mất gốc luôn rồi hay gì
bài 1 thôi đúng ko, và dấu chấm là dấu nhân á
\(2+\dfrac{3}{4}=\dfrac{8}{4}+\dfrac{3}{4}=\dfrac{11}{4}\\ \dfrac{5}{7}:6=\dfrac{5}{7}\cdot\dfrac{1}{6}=\dfrac{5}{42}\\ 5+\dfrac{2}{7}=\dfrac{35}{7}+\dfrac{2}{7}=\dfrac{37}{7}\\ 2-\dfrac{3}{5}=\dfrac{10}{5}-\dfrac{3}{5}=\dfrac{7}{5}\)
\(\dfrac{5}{24}+\dfrac{7}{12}+\dfrac{5}{6}=\dfrac{5}{24}+\dfrac{14}{24}+\dfrac{20}{24}=\dfrac{39}{24}=\dfrac{13}{8}\\ \dfrac{79}{36}-\dfrac{2}{4}-\dfrac{5}{6}=\dfrac{79}{36}-\dfrac{18}{36}-\dfrac{30}{36}=\dfrac{31}{36}\)
\(\dfrac{23}{24}\cdot\dfrac{4}{5}=\dfrac{23\cdot4}{24\cdot5}=\dfrac{23\cdot4}{4\cdot6\cdot5}=\dfrac{23}{30}\\ \dfrac{7}{28}+\dfrac{6}{7}=\dfrac{7}{28}+\dfrac{24}{28}=\dfrac{31}{28}\)
2 + 3/4 = 8/4 + 3/4 = 11/4
5/7 : 6 = 5/7 x 1/6 = 5 /42
5 + 2/7 = 35/7 + 2/7 = 37/7
2 - 3/5 = 10/5 - 3/5 = 7/5
5/24 + 7/12 + 5/6 = 5/24 + 14/24 + 20/24 = 39/24
79/36 - 2/4 - 5/6 = 79/36 - 18/36 - 30/36 = 31/36
23/24 x 4/5 = 23/30
7/28 + 6/7 = 7/28 + 24/28 = 31/28
3/4 là \(\dfrac{3}{4}\) nhé bạn, mấy cái kia cũng thế
giúp vs ạ
Giúp mik vs ạ!