There are four mathematical properties which involve addition. The properties are the commutative, associative, additive identity and distributive properties.
A + B = B + C Commutative property
(A+B) + C = A + (B +C) Associative Property
A + 0 = A Additive Identity Property
A*(B + C) = A*B + A*C Distributive property
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Ensure that the denominators are the same when adding or subtracting fractions.
no answer
The answer also has the same sign.
Subtracting a negative is the same as adding the equivalent positive. For example, subtracting minus 10 is the same as adding 10.
1. the opposite is another word 2. adding or taking a prefix e.g. 'un' 'in' etc 3. taking or adding the word 'not'