Today we started subtracting with integers. He pointed out that you CAN'T subtract integers. That was the main idea he wanted us to remember.You have to ADD the opposite. It sounds confusing so I will explain.
Say you have this integer ----> ( -3 ) - (+3 ) = NO!
You have to change it if it has a subtraction sign in between two integers.
So you have this integer -----> (-3 ) - (+3) =
and you change it to this -----> (-3 ) + (-3 )=
I didn't do anything to the the first part of the integer question. For the middle if it is a negtive or a line eg. - you have to change it to the opposite which is a plus or + you also change the last part of the integer to its opposite in this case you would change the (+3) to a (-3). Ya followin' ?
You always change the the subtraction sign to a positive sign and always switch the second integer to its opposite.
He also reviewed on zero pairs. eg - O O O O O
O O O O O --> OOO
and you are left with 3 negatives which would be positive 3.
Mr.H give us some homework and i thought I would put the three that I chose on since I have no pictures because my computer sucks. You had to choose 3 of 45 questions to do with integer tiles. Here are the ones I chose.
6) (-4) - ( -6) =
(-4) + (+6 )= +2
----->OOOO
Zero pairs--->OOOO -->OO and you are left with positive 2.
18) (+3) - (-2) =
(+3) + (+ 2) =5
OOO + OO = OOOOO they are all positives yay!!
45) (-7 ) - (-9 ) =
(-7 ) + (+9) =
OOOOOOO
OOOOOOO---->OO and you are left with 2.
Ok thats the end of my scribe post for today I know I might not have covered everything, aaaaand I have a tone of grammar errors. anyway i choose Abbie A. to be the next scribe! <3
Subscribe to:
Post Comments (Atom)
Awesome scribe. The picture things were kind of confusing though.
October 27, 2008 at 8:11 PM