Monday, October 27
Subtracting Integers
Today in class we learned how to subtract integers. The thing is, you DON'T subtract them, you add the opposite.
For example. (-1) - (+1) THIS IS WRONG!!
In order to make this correct, you must change the subtraction sign (-) to a plus sign (+).
Then, you change the (+1) to a (-1)
You start with this... (-1) - (+1)
And end up with this... (-1) + (-1) = good! :]
Actually it equals (-2)
Always remember! Don't change the first integer! Only change the subtraction sign (-) to a plus sign (+). Then you change the second integer to it's opposite. Which in this case would be (+1) to (-1).
Integer Tiles
You use integer tiles to help you figure out the answers when you add integers.
(+4) + (-3)=? (Remember the red tiles are positive, the white ones are negative!)
So, since there is only one left, the answer is (+1).
For example. (-1) - (+1) THIS IS WRONG!!
In order to make this correct, you must change the subtraction sign (-) to a plus sign (+).
Then, you change the (+1) to a (-1)
You start with this... (-1) - (+1)
And end up with this... (-1) + (-1) = good! :]
Actually it equals (-2)
Always remember! Don't change the first integer! Only change the subtraction sign (-) to a plus sign (+). Then you change the second integer to it's opposite. Which in this case would be (+1) to (-1).
Integer Tiles
You use integer tiles to help you figure out the answers when you add integers.
(+4) + (-3)=? (Remember the red tiles are positive, the white ones are negative!)
So, since there is only one left, the answer is (+1).Homework
Today for homework we have to do page 46 in the yellow book. Make sure you remember to do three of the questions using integer tiles!
Next scribe : RAYNA! xP
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