Final answer:
The correct answer is A) 10; 2 digits. We find this by adding 1 to the largest single-digit number, 9, resulting in a two-digit sum of 10.
Step-by-step explanation:
The correct answer is option A) 10; 2 digits.
The largest 1-digit number is 9. After adding 1 to it, the sum is 9 + 1 = 10. This sum has 2 digits. It is important not to confuse this straightforward arithmetic question with the concept of significant figures which is typically used in scientific measurements and does not apply here.
The largest 1-digit number is 9. When we add 1 to 9, we get 10. The sum of 10 has 2 digits, 1 and 0. Since we are asked how many digits the sum has, the correct answer is option C) 10; 1 digit.
After adding 1 to it, the sum is 9 + 1 = 10. This sum has 2 digits. It is important not to confuse this straightforward arithmetic question with the concept of significant figures which is typically used in scientific measurements and does not apply here.