Adding and Subtracting within 100

Front

What is the result of subtracting a smaller number from a larger number?

Back

The result is called the difference.

Front

What is the result of adding two numbers together called?

Back

The result is called the sum.

Front

What is the term for the number being subtracted in a subtraction problem?

Back

The number being subtracted is called the subtrahend.

Front

What is the term for the number from which another number is subtracted?

Back

The number from which another number is subtracted is called the minuend.

Front

What is the maximum sum of two numbers when both are less than 100?

Back

The maximum sum is 198 (99 + 99).

Front

What is the minimum difference when subtracting two numbers both less than 100?

Back

The minimum difference is 0 (when both numbers are equal).

Front

How do you check your subtraction answer?

Back

You can check your subtraction answer by adding the difference to the subtrahend to see if it equals the minuend.

Front

What is the process of breaking down a number into smaller parts to make addition easier called?

Back

This process is called decomposition.

Front

What is the associative property of addition?

Back

The associative property states that the way in which numbers are grouped in addition does not change the sum.

Front

What is the commutative property of addition?

Back

The commutative property states that the order in which two numbers are added does not change the sum.