Final answer:
The correct answer is option A, as counting up from the lesser number to the greater number to find the difference is known as counting on, a basic arithmetic strategy.
Step-by-step explanation:
The correct answer is option A. Counting up from the lesser number to the greater number to find the difference of two numbers is indeed known as counting on. This method is a basic arithmetic strategy often used to teach students how to perform subtraction more efficiently. For example, to find the difference between 6 and 3, instead of counting backwards, we start at 3 and count up to 6, which shows us that the difference is 3 (3, 4, 5, 6). When counting on, we're essentially adding the amounts needed to get from the smaller number to the larger number, thereby finding the difference between the two numbers.
Counting up from the lesser number to the greater number to find the difference of two numbers is known as counting on. This is false.
Counting on is actually the process of counting forward from a given number. For example, if you have the numbers 2 and 5, counting on would involve starting at 2 and adding one more each time until you reach 5. So the sequence would be 2, 3, 4, 5.