When using integers, an easy way to understand the process of adding and subtracting them are by using the words remove, and, owe and have. Remove represents the subtraction sign (-). And represents the addition sign (+). Owe represents negative integers (-4) and have represents positive integers (+4 or 4).

-1 - (-4) =

To solve this equation, it would be best to first write out the equation in words.

owe 1 remove owe 4 =

Next would be to draw the equation using integer chips.

_ _ _ _ _

_ _ _ _ _

Now since you cannot subtract negative integers, you must make a zero pair.

_ _ _ _

+ + + +

Now that you have a zero pair, you may now remove the negative integers.

_ _ _ _

+ + + +

Now that you have a zero pair, you may now remove the negative integers.

+ + + +

Now all that's left is the 4 positive integers and 1 negative integer.

_

+ + + +

Once again you must remove the zero pairs which will leave you with the answer.

+ + +

-1 - (-4) = 3

Here are the steps altogether.

To know whether it is an addition equation or a subtraction equation, just remember that if 2 subtraction signs are beside each other, it is a subtraction equation.

Here is a video to further understand subtracting integers.

I like how you made this post really simple yet detailed at the same time. It was easy for me to understand! Good job, Angel! :)

ReplyDeleteGreat job! i liked how you explained "remove" "owe" and "have" it makes it more easier to understand. i also like your picture, simple and easy to understand. Also thanks for the tips on my post! Great Job!

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