3.5A Adding and Subtracting on a number line

Front

What is a number line?

Back

A number line is a straight line with numbers placed at equal intervals along its length, used to represent numbers and perform operations like addition and subtraction.

Front

How do you add numbers on a number line?

Back

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

Front

How do you subtract numbers on a number line?

Back

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

Front

What does the '+' symbol mean?

Back

The '+' symbol means to add or combine two numbers.

Front

What does the '-' symbol mean?

Back

The '-' symbol means to subtract or take away one number from another.

Front

What is the result of 15 + 16?

Back

The result of 15 + 16 is 31.

Front

What is the result of 31 - 16?

Back

The result of 31 - 16 is 15.

Front

If you start at 15 on a number line and add 16, where do you end up?

Back

You end up at 31 on the number line.

Front

If you start at 31 on a number line and subtract 16, where do you end up?

Back

You end up at 15 on the number line.

Front

What is the first step in solving 15 + 16 on a number line?

Back

The first step is to locate the number 15 on the number line.