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Old 08-01-2007   #1
Chelsea A
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Default I need help on my math homework?

I have math homework that I really don't understandcan someplease help me and explain to me how you did it??my homework says:Find each sum or difference.1) -5 + (-3)2)10 - (-6)3)-7 + 214)11-155)9 + (-9)6)-13 - 2
 
Old 08-01-2007   #2
havnagootime
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How about you stay off the damn internet, and DO YOUR HOMEWORK YOURSELF!Jesus! Do I have to do EVERYTHING for you kids?
 
Old 08-01-2007   #3
short4chris
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1) -5 + (-3) -5-3 -72)10-(-6) 10+6 163) -7+21 21-7 144) 11-15 -45) 9+(-9) 9-9 06) -13-2 -15
 
Old 08-01-2007   #4
*mouse*
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just solve the solution(sum is addition and difference is for subtraction)if its easier, try switching the signs (of just the second and third)1) -5-3 =-82)10+6 =163)-7-(-21) =144)11+(-15) = -45)9-9 =06)-13+(-2) =-15however, as you can see, it sometimes makes the equation look worse (such as in number 3, 4)you can try thing of a numberline that goes into the negatives as wellsuch as in number 3, you start off with -7 but need to add 21 to find the suminstead of trying to add this, you can subtract 7 from 21 since this difference is also the same as the number you need for the sum of -7 and a number to be 21im sorry if this is confusing but its kinda hard to explaingood luck and if you have trouble, ask your teacher for more help/better explaining:]
 
Old 08-01-2007   #5
imzi99
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On #1, you are adding a negative 5 and negative 3. It is pretty straight forward, just add the 5 and 3 and keep the negative sign in your answer. For #2, because you are subtracting a negative 6, the minus signs cancel each other out, making the problem 10 + 6.#3, if you use a number line, you can figure this out. Starting at -7, count 21 spaces to right since you are adding the 21. Like this: -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17#4, you can use the same number line for this problem...start at 11 and move to the left 15 spaces since you are subtracting. #5, again you can use the number line, but if you are getting to understand how this works...try the math.#6, If you want to use the number line, just add some more numbers on to the negative side, start at -13 and move left 2 spaces since you are subtracting. I hope this helps you understand it better, without just giving you the answers. Good Luck.
 
 

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