addition

Front

What is addition?

Back

Addition is a mathematical operation that combines two or more numbers to get a total or sum.

Front

What is the sum of 6 and 1?

Back

The sum of 6 and 1 is 7.

Front

What is the sum of 9 and 1?

Back

The sum of 9 and 1 is 10.

Front

What is the sum of 17 and 2?

Back

The sum of 17 and 2 is 19.

Front

What is the sum of 5 and 10?

Back

The sum of 5 and 10 is 15.

Front

What is the sum of 3 and 10?

Back

The sum of 3 and 10 is 13.

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 their sum (e.g., (a + b) + c = a + (b + c)).

Front

What is the identity property of addition?

Back

The identity property of addition states that the sum of any number and zero is that number (e.g., a + 0 = a).

Front

How do you add two-digit numbers?

Back

To add two-digit numbers, align the numbers by place value (tens and ones) and add each column, carrying over if necessary.