IXL | Apply addition and subtraction rules

The number line shows an unknown number,

–

positive or negative?

positive

negative

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Learn with an example

question

The number line shows an unknown number,

–

positive or negative?

positive

negative

key idea

On a number line, numbers to the left of 0 are

negative.

Numbers to the right of 0 are

positive.

Opposite numbers are the same distance from 0 on a number line, but on opposite sides of 0. The opposite of

can be written as

–

For example, if

–

then its opposite is

–

(

–

)

= 3.

solution

The number line shows that

is to the left of 0. So,

is a negative number.

–

is the opposite of

so it is on the opposite side of 0.

The number line shows that

–

is to the right of 0. So,

–

is a positive number.

Looking for more? Try these:

Lesson: Adding and subtracting integers

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A.2Integer addition and subtraction rules

Lesson: Adding and subtracting integers

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