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!
ReplyDelete