Câu 4: Trang 67 - sách giáo khoa (SGK) Toán tiếng Anh lớp 4Apply the properties of a number to a...

In summary, to apply the properties of a number to a sum to calculate the product of two numbers, we can break down the numbers into easier to calculate parts and then add the products of these parts together to find the final result.

b) For 123 x 101, we can multiply 100 by 123, 20 by 123, and 3 by 123 separately. 100 x 123 = 12300, 20 x 123 = 2460, and 3 x 123 = 369. Then we add these three products together to get 12300 + 2460 + 369 = 14929.

b) For 213 x 111, we can multiply 200 by 111, 10 by 111, and 3 by 111 separately. 200 x 111 = 22200, 10 x 111 = 1110, and 3 x 111 = 333. Then we add these three products together to get 22200 + 1110 + 333 = 23643.

a) For 35 x 101, we can multiply 30 by 101 and 5 by 101 separately. 30 x 101 = 3030 and 5 x 101 = 505. Then we add these two products together to get 3030 + 505 = 3535.

a) For 26 x 11, we can multiply 20 by 11 and 6 by 11 separately. 20 x 11 = 220 and 6 x 11 = 66. Then we add these two products together to get 220 + 66 = 286.