Answer: To simplify (or make more complicated):
++ =+
+- = -
-+ = -
-- = +
Put things in brackets:
2-1 : (+2)-(+1) operator is -+ or - : 2-1
2+1 : (+2)+(+1) operator is ++ or + : 2+1
2--1 : (+2)-(-1) operator is -- or + : 2+1
2+-1: (+2)+(-1) operator is +- or - : 2-1
Basically if the sign is the same it's +
different and -
Answer: It helps make things clearer if you draw or visualize numbers on a number line. Adding a positive number means going to the right; adding a negative number means going to the left. Subtracing a number is the same as adding its additive inverse; therefore, adding a negative number means going to the left, subtracting a negative number means going to the right.
Wiki User
∙ 13y agoYes. A negative subtracted by a negative is a positive. Just remember that two like signs become a positive sign, and two unlike signs become a negative sign.
no, to add and subtract like and unlike fractions the denominator has to be the same,
first find a common denominator then subtract the top numbers
You add all the numbers with + signs and subtract all that have minus signs.
Like signs: When both numbers are either positive or negative, like: +6 and +4 Unlike signs; When one is either positive or negative, like he nd lo sn.x
we can use the number line as a model to help us visualizeadding and subtracting of signed.
No. You can't subtract unlike terms
Yes. A negative subtracted by a negative is a positive. Just remember that two like signs become a positive sign, and two unlike signs become a negative sign.
no, to add and subtract like and unlike fractions the denominator has to be the same,
Like signs give a positive answer. Unlike signs give a negative answer.
first find a common denominator then subtract the top numbers
You add all the numbers with + signs and subtract all that have minus signs.
You would have to convert the units to be alike, then you would be able to add and subtract them.
Like signs: When both numbers are either positive or negative, like: +6 and +4 Unlike signs; When one is either positive or negative, like he nd lo sn.x
Positive and negative signs are unlike one another.
By the signs: 2+2(Add) 2-2(Subtract) +=add -=subtract
To add and subtract unlike fractions.