Câu 3: Trang 139 sách giáo khoa (SGK) toán tiếng Anh lớp 4Calculate:Tính:a) \(\frac{5}{2} \times...

{
"content1": "a) Calculate: \(\frac{5}{2} \times \frac{1}{3} + \frac{1}{4}\)",
"content2": "a) \(\frac{5}{2} \times \frac{1}{3} + \frac{1}{4} = \frac{5}{2} \times \frac{1}{3} + \frac{1 \times 2}{4 \times 2} = \frac{5}{6} + \frac{2}{8} = \frac{5}{6} + \frac{1}{4} = \frac{5 \times 2}{6 \times 2} + \frac{1 \times 3}{4 \times 3} = \frac{10}{12} + \frac{3}{12} = \frac{10+3}{12} = \frac{13}{12}\)",
"content3": "b) Calculate: \(\frac{5}{2} + \frac{1}{3} \times \frac{1}{4}\)",
"content4": "b) \(\frac{5}{2} + \frac{1}{3} \times \frac{1}{4} = \frac{5}{2} + \frac{1 \times 1}{3 \times 4} = \frac{5}{2} + \frac{1}{12} = \frac{5 \times 6}{2 \times 6} + \frac{1}{12} = \frac{30}{12} + \frac{1}{12} = \frac{30+1}{12} = \frac{31}{12}\)"
}