Câu 2:Trang 114 sách giáo khoa (SGK) toán tiếng Anh lớp 4Make these fractions have amon...

b) To get a common denominator for $rac{5}{12}$ and $rac{3}{8}$, we can calculate the LCM of 12 and 8, which is 24. Next, we convert the fractions: $rac{5 imes 2}{12 imes 2} = rac{10}{24}$ and $rac{3 imes 3}{8 imes 3} = rac{9}{24}$.

a) In order to find the common denominator for $rac{7}{5}$ and $rac{8}{11}$, we can multiply both fractions by the other's denominator. So, the equivalent fractions are $rac{7 imes 11}{5 imes 11} = rac{77}{55}$ and $rac{8 imes 5}{11 imes 5} = rac{40}{55}$.

c) To make the fractions $rac{17}{10}$ and $rac{9}{7}$ have a common denominator, we need to find the LCM of 10 and 7, which is 70. So, the equivalent fractions are $rac{17 imes 7}{10 imes 7} = rac{119}{70}$ and $rac{9 imes 10}{7 imes 10} = rac{90}{70}$.

b) To make the fractions $rac{5}{12}$ and $rac{3}{8}$ have a common denominator, we need to find the LCM of 12 and 8, which is 24. So, the equivalent fractions are $rac{5 imes 2}{12 imes 2} = rac{10}{24}$ and $rac{3 imes 3}{8 imes 3} = rac{9}{24}$.

a) To make the fractions $rac{7}{5}$ and $rac{8}{11}$ have a common denominator, we need to find the least common multiple (LCM) of 5 and 11, which is 55. So, the equivalent fractions are $rac{7 imes 11}{5 imes 11} = rac{77}{55}$ and $rac{8 imes 5}{11 imes 5} = rac{40}{55}$.