Adding and Subtracting within 100

Front

What is the result of 73 - 21?

Back

52

Front

What is the result of 98 - 27?

Back

71

Front

What is the result of 79 - 52?

Back

27

Front

What is the result of 51 + 11?

Back

62

Front

What is the result of 66 + 33?

Back

99

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 definition of subtraction?

Back

Subtraction is the mathematical operation of taking one number away from another.

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.

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.

Front

What is the difference between addition and subtraction?

Back

Addition combines numbers to increase their total, while subtraction removes a number from another, decreasing the total.