So today i am learning how to subtract Intergers so i want to learn early so can you please tell me what -15 - ( - 8 ) = it woul
d be alot of help here is a google docs and could you please answer my questions and then send them to me and my email is [email protected] but the docs is some adding Camparing and subtracting Please just give me your email I need feed back ASAP
1st you have to know that in mathematiques the signs preceding any number are of paramount importance: 1) addition of 2 digits with different signs: a) 8 - 3 = 5 b)-8 + 3 = -5 (if the negative sign is associated with largest digit, then the subtraction will be negative and vice versa c) addition of 2 digits with both negative sign - 5 - 8 = -13 .You jus add up both by keeping the negative sign
2) Multiplication: 2 digits with different signs: a) (8) x (-3) = -24 b) (-8) x (3) = -24 so (-) x (+) or (+) x (-) is ALWAYS negative
3) Multiplication: 2 digits with SAME signs; a) +8 x +3 = 24 b) (-8) x (-33) =24 so (-) x (-) or (+) x (+) is ALWAYS POSITIVE
4) what applies on multiplication applies also on division (same principle)
5) Now we come to parenthesis: When you have parenthesis, the sign preceding the parenthesis is also of paramount importance:
a) a positive sign preceding a parenthesis doesn't affect the consents if you remove these parenthesis: +(5 + 3y) = 5+3y or 2(5+3y) = 10+6y
b) a NEGATIVE sign preceding a parenthesis DOES affect the consents if you remove these parenthesis:
-2(4x -2y -3) ==> If you remove the parenthesis by multiplying by (-2), all signs inside will change: the (+) become ( -) and vice versa,. However mind you, if you have a negative Now let's take your equation: -15 - ( - 8 ) = -15 +8, remember a negative sign preceding any parenthesis will change all signs inside if you REMOVE the parenthesis: some examples: a) -15 + 10 -(4-32x -4y) 1st (-15 + 10) = -5 since the largest number is preceded by a NEGATIVE sign so : -5 - (4-32x -4y) remove the parenthesis -5 -4 + 32x +4y b) -(-5-8) -(+5+8) ==> -5-8 -5-8 = -10 - 16 => - 26
