Addition of Real Numbers
JS:
I need help with adding real numbers. I don’t know which numbers to put on the number line when there are more than two numbers. I don’t know what numbers to put on the number line if its like: 1.2+7.53+7.64
How would you plot that on a number line?
Here is how I would figure it out:
Problem:
4.5+2.5+7.2=
I need help with adding real numbers. I don’t know which numbers to put on the number line when there are more than two numbers. I don’t know what numbers to put on the number line if its like: 1.2+7.53+7.64
How would you plot that on a number line?
Here is how I would figure it out:
Problem:
4.5+2.5+7.2=
13 comments:
VB:
i am still having trouble with adding positive numbers and negative numbers. I get confused with how to add negative numbers with positive numbers.
Example: -2+5=
i am not sure how i would do that. like...i am not sure what to do if the negative is smaller than the positive. and when the negative is smaller than the positive...i just get confused....
I was confused in chapter 2.2. The addition of real numbers was easy. But the thing I thought was confusing a little bit was at the end of a problem, there was a ; symbol. This confused me because it was the substitution for the variable, but the way it was put into the problem, it looked like it was part of the equation.-A.L.
J.B
To answer your question ummm so basically if you have a negitive number you just subtract it so in your example would be -2+5 the answer is positive three. So you are subtracting two from positive 5.
V.b-
the answer to your example would be 3. If youre having trouble doing these, picture a number line. imagine that there is a dot at -2 and it goes up the # line 5. What # wuld it be at? 3.
I hope this helped u.
M.G. to V.B.
ok, so if your first integer is a negative and it is smaller than your positive integer and you are doing addition the answer will always be positive.EXAMPLE:-22+30=8 it is 8 because -22 is smaller than 30. ok, if your first integer is negative and it is larger than your second positive integer and you are subtracting the answer will always be negative. EXAMPLE: -18+8=-10 because -18 is larger than 8. if your first intger is positive and it is larger than your second negative number and you are adding the answer will always be positive. EXAMPLE: 15+-7= 8
15 is bigger than -7.
ok, if your first positive integer is smaller than your second neagtive integer and you are adding the answer will always be negative.EXAMPLE: 11+-15=-4
11 is smaller than -15
M.G. to V.B.
ok, so if your first integer is a negative and it is smaller than your positive integer and you are doing addition the answer will always be positive.EXAMPLE:-22+30=8 it is 8 because -22 is smaller than 30. ok, if your first integer is negative and it is larger than your second positive integer and you are subtracting the answer will always be negative. EXAMPLE: -18+8=-10 because -18 is larger than 8. if your first intger is positive and it is larger than your second negative number and you are adding the answer will always be positive. EXAMPLE: 15+-7= 8
15 is bigger than -7.
ok, if your first positive integer is smaller than your second neagtive integer and you are adding the answer will always be negative.EXAMPLE: 11+-15=-4
11 is smaller than -15
commenting on A.l- yeah, that confused me too. it is a simpler way to write it, but I would stick with the traditional x=.
E.Ma to V.B.
There are rules to adding positive and negative numbers.
1. When adding two negatives the sum will always be a positive.
4+4=8
2. When adding two negatives the sum will be a negative. -4+-5=-9
3. When adding a positive then a negative the sum could be either a positive or negative the sum could be either a negative or a positive depending on which number's absolute value is larger. If the first number's absolute value is larger the sum will be a positive/ If the second number's absolute value is larger the sum will be a negative. 4+-3=1 or 1+-3=-2
4. When adding a negative then a positive the sum could either be a positive or a negative. If the first number has a larger absolute value than the second number the sum will be a negative. If the second number's absolute value is larger the sum will be a positive. -4+3=-1 or -5+6=1
dc
im having trouble with the whole like adding numbers thing
E. Mu. to A.L.
the semi-colon is not part of the expression, it just signifies what number the variable is, so when you do the subsitution process, you subsitute the number after the ; with the variable
iw
how would i do somethin like -7-9+(-17)+34 ?? wat would i do first?
iw
D.E. to V.B.
Adding negative and positive numbers are pretty simple, just think the opposite of simple adding. It is easier to think 5-2 than -2+5, its easier.
D.E. to I.W.
It's a piece of cake, really. Just make the problem simpler. You dont eat a whole piece of cake, you cut it into pieces, and you'll see the difference. And if it's really hard and can't be divided, try to cut it in half, my knowledge to yours :D.
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