Addition

Front

What is the sum of 2 and 13?

Back

15

Front

What is the result of adding 9 and 8?

Back

17

Front

Calculate the sum of 12 and 54.

Back

66

Front

What do you get when you add 2 and 7?

Back

9

Front

What is 11 plus 18?

Back

29

Front

What is the definition of addition?

Back

Addition is the mathematical operation of combining two or more numbers to get a total.

Front

What is the commutative property of addition?

Back

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

Front

What is the associative property of addition?

Back

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

Front

What is the identity property of addition?

Back

The identity property states that adding zero to any number does not change the value of 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, add the digits in the ones place, carry over if necessary, and then add the digits in the tens place.