Properties of Numbers and Operations

Front

What is subtraction?

Back

Subtraction is taking away a number from another number.

Front

Is subtraction communicative?

Back

No, subtraction is not communicative. For example, 10 - 3 is not the same as 3 - 10.

Front

What is the result of 10 - 7?

Back

The result is 3.

Front

Fill in the blank: ___ + 5 = 5 + 9

Back

The answer is 9.

Front

What is the minimum number of people in a group of 10 guitar players and 13 saxophone players?

Back

The minimum number is 13.

Front

What are compatible numbers?

Back

Compatible numbers are numbers that are easy to add or subtract in your head.

Front

Use compatible numbers to solve: 78 - 23 = ?

Back

The answer is approximately 60.

Front

What does it mean to add?

Back

Adding means putting together two or more numbers to find a total.

Front

What is the result of 5 + 4?

Back

The result is 9.

Front

What is the difference between addition and subtraction?

Back

Addition combines numbers, while subtraction takes one number away from another.