Câu 3: Trang 148 sách giáo khoa (SGK) toán tiếng Anh lớp 4Sum of two numbers with the...

Let the two numbers be m and n. Given that m + n = 99 and m/n = 4/5, we can find the numbers m = 44 and n = 55 by solving these equations.

Assume the two numbers are a and b. We have a + b = 99 and a/b = 4/5. By solving these equations, we find a = 44 and b = 55 as the numbers required.

Let the two numbers be x and y. Since the sum of two numbers is the greatest with two digits, we have x + y = 99. And the ratio of those two numbers is 4/5, so x/y = 4/5. Solving these two equations simultaneously, we get x = 44 and y = 55.