Number Line Addition and Subtraction

Front

What is a number line?

Back

A number line is a straight line that represents numbers in order. It has arrows on both ends and can show positive and negative numbers.

Front

How do you add numbers using a number line?

Back

To add numbers on a number line, start at the first number and move to the right by the number of spaces equal to the second number.

Front

How do you subtract numbers using a number line?

Back

To subtract numbers on a number line, start at the first number and move to the left by the number of spaces equal to the second number.

Front

What does it mean to 'move to the right' on a number line?

Back

Moving to the right on a number line means you are adding, and the numbers get larger.

Front

What does it mean to 'move to the left' on a number line?

Back

Moving to the left on a number line means you are subtracting, and the numbers get smaller.

Front

If you start at 3 and add 2, where do you land on the number line?

Back

You land on 5.

Front

If you start at 7 and subtract 4, where do you land on the number line?

Back

You land on 3.

Front

What is the result of adding 0 to any number on a number line?

Back

The result is the same number; adding 0 does not change the value.

Front

What is the result of subtracting a number from itself on a number line?

Back

The result is 0; any number minus itself equals zero.

Front

What is a positive number?

Back

A positive number is a number greater than zero, found to the right of zero on a number line.