Adding 3 Two-Digit Numbers

Front

What is the sum of three two-digit numbers?

Back

The sum of three two-digit numbers is the total obtained when you add them together, which can range from 30 (10+10+10) to 297 (99+99+99).

Front

How do you add two-digit numbers?

Back

To add two-digit numbers, align the numbers by their place values (tens and units) and add each column starting from the rightmost column, carrying over if necessary.

Front

What is carrying in addition?

Back

Carrying in addition is the process of transferring a value from one column to the next when the sum of that column exceeds the base value (10 in decimal).

Front

What is the maximum possible sum of three two-digit numbers?

Back

The maximum possible sum of three two-digit numbers is 297, which occurs when adding 99 + 99 + 99.

Front

What is the minimum possible sum of three two-digit numbers?

Back

The minimum possible sum of three two-digit numbers is 30, which occurs when adding 10 + 10 + 10.

Front

What are two-digit numbers?

Back

Two-digit numbers are integers ranging from 10 to 99, inclusive.

Front

How can you check if your addition is correct?

Back

You can check your addition by using the inverse operation (subtraction) or by adding the numbers in a different order (commutative property).

Front

What is the commutative property of addition?

Back

The commutative property of addition states that changing the order of the addends does not change the sum (e.g., a + b = b + a).

Front

What is the associative property of addition?

Back

The associative property of addition states that the way in which numbers are grouped does not change the sum (e.g., (a + b) + c = a + (b + c)).

Front

What is a two-digit number's tens place?

Back

The tens place of a two-digit number is the second digit from the right, representing how many tens are in the number (e.g., in 34, the tens place is 3).