Number Line Addition and Subtraction

Front

What is a number line?

Back

A number line is a straight line that represents numbers as points at equal intervals along its length, typically used to visualize addition and subtraction.

Front

How do you represent addition on a number line?

Back

To represent addition on a number line, you start at the first number and move to the right by the value of the second number.

Front

How do you represent subtraction on a number line?

Back

To represent subtraction on a number line, you start at the first number and move to the left by the value of the second number.

Front

What is the result of 24 – 11 on a number line?

Back

The result of 24 – 11 is 13, which can be found by starting at 24 and moving 11 units to the left.

Front

What does it mean to add two numbers on a number line?

Back

Adding two numbers on a number line means finding the total by moving right from the starting number by the amount of the second number.

Front

What does it mean to subtract two numbers on a number line?

Back

Subtracting two numbers on a number line means finding the difference by moving left from the starting number by the amount of the second number.

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 adding zero to any number does not change the number (e.g., a + 0 = a).

Front

How can you check your addition on a number line?

Back

You can check your addition on a number line by verifying that the distance moved to the right corresponds to the value being added.