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Math
I am so confused with math. We're doing addition and subtraction of positive and negative integers. Can anyone please answer the following problems and explain how you got that answer? I rate high!
-20 - (-10) =
-35 - 16 =
There's also a sort of word problem one too. Tell me what the math sentence would be and the sum.
Start at -6. Face the negative direction. Move backward 2 units.
Please help!
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ok it is simple... -20 - (-10) when you are subtracting and you have a negative number you make it addition and you change the second number to the opposite example:
5 - 6 = 5 + (-6) = -1 and on adding you actually subtract from the lrger number and take the sign of the larger.
on word problems in algebra what you have to do first is find out what they want.
the second step is to turn it into an algebraic expression.
example:
billy has $2 he borrows 7$ from a friend and $8 from another. how much money does billy owe his friends?
what they want to know is how much billy owes his friends.
so you would add the two and subtract it from 2
expression=
7 + 8 = 15 then it is 2 - 15 = 2 + (-15)= -13
so he is under $13 so he owes his friends $13
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if its a subtraction prob change the # to the rite to the opposite sign and change the main sign to the opposite like: -20 - (-10) change it to -20 + 10 =?
then you figure out the larger # - the smaller # then wen u get the asnwer wich 20-10 =10 to find if it is a negative or posative take the sign of the bigger # = -10 becasue 20 is bigger than 10
i hope i helped and plz rate me a high number !
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I'll give you a little trick..
Neg + Neg =Neg
Pos + Pos = Pos
Neg x Neg = Pos
Pos x Neg = Neg
Neg- Neg = neg
Pos- neg = it depends.. this is one of the harder ones.
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-20 - (-10) = -10
-35 - 16 = -51
Just type it into your calculator.
As for the story problem
Start at -6. Face the negative direction. Move backward 2 units.
_______________________________________________
-9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8
Alright. That's a number line. Start at -6, and move to the right 2 times, that brings you to -4.
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m-mMath?
*shivers*
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-20 - (-10) = -10 [Negative twenty, minus a negative, or plus, ten.]
-35 - 16 = -51 [Negative thirty-five, minus an additional sixteen.]
-6 - 2 = -4 [If you are standing on a physical number line, facing the negatives, as in going down farther: -7, -8, -9; now move backwards, from where you are facing, by two units. You should find yourself at negative four.]
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-10
19
and 51
remember to negatives become a positive here is a chart i found very useful for me
(-) + (+) = negative
(-) + (-) = positive
(+) + (+) = positive
(+) + (-) = negative
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-20 - (-10) would be -10 because the - (-10) would change to +10 since theres 2 negatives in a row...and -20 + 10 is -10
-35 - 16 is like adding 35 and 16.. and then putting a - sign infront of them answer...
-35 - 16 = -51
the word problem:
-10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0
you start at -6 and go backwards facing the negative direction...it would be -4, im pretty sure
i hope that made sense, lol
good luck hope i helped **x0x0
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-20-(-10)= -10
-35-16= -51
Basically with negatives if its a negative minus a positive then you add more to the negitive number. such as #2^^ And if its a negative or positive minus another negative, then it changes to a plus sign. So you just add them...like #1^^ It's weird at frist but once you figure it out its uber easy. Let me know if thats confusing and I'll see if i can explain better.
~*~*~Ren~*~*~
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-20 - (-10) = -10
-35 - 16= -51
Start at -6. Face the negative direction. Move backward 2 units. = -4
Thankyou, Come again
Edit: *Pokes that guy whom just beat me!*
Edit2: Girl whom just beat me rather ;)
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okay... this is a sinch.
-(-10)=10
so
-20+10=10-20
10-20=-10
-35-16=35+16 in the negative direction.. so it would be -51
-6-(-2)=-6+2
=-4
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