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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.
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Is a negative subtract a negative a positive?
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.
Do you add and subtract like and unlike fractions in the same way?
no, to add and subtract like and unlike fractions the denominator has to be the same,
What are the steps to subtract unlike fractions?
first find a common denominator then subtract the top numbers
How do you add numbers with different signs?
You add all the numbers with + signs and subtract all that have minus signs.
What are like and unlike 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
