Question

При сложение двух четырёхзначных чисел получилось четырёхзначное число. Первое слагаемое начинается с цифры 8.С какой цифры начинается второе слагаемое?И с какой цифры начинается сумма двух чисел?Объясни ответ.

Answer 1

Начинается с 1 , т.к. при при всех значениях больше за 1 в сумме получится пятизначное число. Соответственно сумма двух чисел начинается с 9

Answer 2

Solving the Addition Problem

To solve the problem, we are given that the sum of two four-digit numbers is also a four-digit number, and the first addend starts with the digit 8. We need to find out with which digit the second addend starts and with which digit the sum of the two numbers starts.

Finding the Second Addend

The first addend starts with the digit 8. According to the snippet from Source the digits in a number range from 0 to 9. Since the first addend starts with 8, the second addend must start with a digit that, when added to 8, does not result in a carry over to the next place value. Therefore, the second addend must start with a digit from 0 to 1 to ensure that the sum does not exceed 9 in the first place value.

Finding the Sum

The sum of the two numbers is also a four-digit number. This means that the sum of the first and second addends does not result in a carry over to the fifth place value. Based on the snippet from Source the sum of the first and second addends should not exceed 9 in the first place value to ensure that the sum is a four-digit number.

Conclusion

Therefore, the second addend starts with a digit from 0 to 1, and the sum of the two numbers starts with the digit 9 to ensure that the sum is a four-digit number without a carry over to the fifth place value.

Second Addend: Starts with a digit from 0 to 1. Sum: Starts with the digit 9 to ensure a four-digit number without a carry over to the fifth place value.