Best Answer

There are a few key methods to add and subtract integers. The first is easy to use but takes more time and thought (less automatic with practice). It is the number line method. Imagine (or draw!) a number line with 0 at the middle and negative numbers extending to the left. Now when you add a number, go to the left if it is negative and the right if it is positive to arrive at the answer. When subtracting do the opposite (as the subtraction sign negates the value of the number). For example, 3 - (-4) can be thought of as follows. Begin at positive 3. Now move 4 to the right (minus a negative is to the right). We end up at positive 7, the answer.

Another method is to change all subtraction problems to addition problems and learn to add any combination of integers (two positive, two negatives, one of each, and with 0). Generally:

a - b = a + (-b).

For examples:

3 - (-4) = 3 + -(-4) = 3 + 4 = 7.

-2 - 3 = -2 + (-3) = -5.

2 - 1 = 2 + (-1) = 1.

Note that the sum of two positive numbers is the sum of their absolute values. The sum of two negative numbers is the inverse of the sum of their absolute values. In other words, two positives become more positive and two negatives become more negative. Further, adding 0 does nothing to the number (additive identity).

Finally, when confronted with both a positive and negative number, whichever has the larger absolute value will be the sign of the result. Then take the difference in absolute values and apply that sign to the result.


My improvement is here:

The above is right, and it's for subracting signed (positive +, and negative - )integers. Some people might not know much about signed integers, so I try to give some improvement on just basic/plain integers.

Basically in order to subtract, you need to know how to add to see if you have done it right.

Now consider I have a basket of many apples. I could take some, say 5 out of the basket, hence I have subtracted 5 apples from the basket. I may or may not even know how many apples are left. In order to know how many are left I would need to initially know how many were in the basket to start with. If there were 8 apples in the basket to start with and I took a group of 5 out, then I have a group of 3 apples left in the basket because 8 - 5 = 3 since the basket originally contained the two groups of: 5 apples and 3 apples combined together, mathematically this is noted with addition: 5 + 3 = 8. We see that if you subtract one group (either the group of 5 or the group of 3) from 8, you will have the other group left.
How do you subtract intergers?
subtracting integers with tiles

to add integers, we combine group of tiles

to subtract integers, we do the reverse:


recall the equal numbers of red and yellow tiles model 0

for example:,(-5)+(+5)=0

adding 0 to the pair doesnt change its value.

for example:,(-3)+0=-3

to use tiles to subtract integers, we model the first integer, then take away the

number of tiles indicated by the second integer.

we can use tiles to subtract (+5)-(+9)=

answer: -4

by:Izabela torbinski

User Avatar

Wiki User

โˆ™ 2017-08-07 09:42:31
This answer is:
User Avatar
Study guides
See all Study Guides
Create a Study Guide
More answers
User Avatar


Lvl 1
โˆ™ 2020-04-22 22:47:59


User Avatar

Add your answer:

Earn +20 pts
Q: How do you subtract integers?
Write your answer...
Related questions

How do you do addition integers?

addition and subtract in integers

Why is it important to add and subtract integers?

It is important to add and subtract integers: to get a new integer value in mathematics .

What can you do with integers?

you can add subtract multiply and divide them.

What is the rule for subtracting integers?

To subtract integers u use kcc aka keep change change on the sighn and then u subtract normaly.

Why is it important to learn how to subtract and add with different integers?

Because otherwise you would only know how to subtract and add with the same integers. Not a particularly useful skill unless just those integers turned up!

How do you add and subtract integers with similar sides and dissimilar sides?

Integers do not have sides so the question does not make sense.

What are the four operations on integers?

add, subtract, multiply, divide

How do you find the difference between integers?

Subtract the smaller from the larger.

When adding two opposite integers?

Subtract the number you first thought of.

How do you subtract integers on a number line?

take away from number places

How do you add and subtract positive and negative integers?

+2 + -1= 1

How do you subtract integers like and unlike sign?

what's 8+15=

What grouping symbols exponents multiply and divide add and subtract?


How do you add and subbtract positive and negative integers?

When adding negative integers, you subtract. (2+-1=1) When subtracting negative integers, you add. (2--3=5)

What happens when you add sutract multiply and divide integers?

When you add, subtract, or multiply integers, you get integers. When you divide one integer by another one, you may or may not get an integer.

What is rule in unlike sign in integers?

Subtract and the Keep the sign of the one that has more

What are the rules on four fundamental operation of integers?

add subtract divide multiplication

How do you determne a difference when subtracting 2 integers that have the same sign?

You subtract the smaller from the larger.

When adding integers and ones negative how do you figure out the answer?

Take the positive one and subtract the negative amount.

How do you subtract integers from another integer without using counters and a timeline?

The answer depends on your mathematical ability.

How do you add or subtract integers with a different sign?

Adding two numbers with different signs means subtracting the two absolute integers (without sign) and vice versa.

When you subtract integers do you always move left on a number line?

No.If you subtract a positive number, you move to the left.If you subtract a negative number, you move to the right.

When subtracting integers with variables that have different exponents do you subtract the exponents too?

You do not. The exponent is only subtracted in division.

What happens when you add subtract divide and multiply integers?

You arrive at a resultant, the resultant depends on the operation carried out.

What do integers allow you to do that whole numbers do not?

The term "whole numbers" is ambiguous; it may refer either to integers, or only to positive integers (perhaps including zero). The set of integers is closed under subtraction, that means, you can subtract any number from any other number. This is not possible in the set of counting numbers (non-negative integers).