## Monday, April 20, 2009

### Scribe Post for April 20, 2009

This is what we did in Math on April 20, 2009

Problem of the Week:

What is the least positive integer meeting each of the following conditions?

Dividing by 7 gives a remainder of 4.
Dividing by 8 gives a remainder of 5.
Dividing by 9 gives a remainder of 6.

Notes:

Integer Subtraction using chips

In pairs solve the following using (+) and (-) chips.

(+9) - (-8)= -1
(-10)-(-4)= -6
(+5)-(+8)= -3
(-3)-(-7)= -4
0 -(+6)= -6

To subtract integers using chips (+) and(-) chips...

1. Model the first integer in the equation by using chips.
2. Then take away the number of chips indicated by the second integer.
3. "If nothing is there add a zero pair."

Note that adding zero pairs to the first integer does not change its value but does give something to take away if we need to in order to solve the question.

Here is an example:

(-)(-)
5-7= (-)(-)

5-7= -2

And then we played a game where we had to go up/down the mountain/bottom of the sea then back to sea level.

And we got back our tests from Friday.

And
you can also go to this website: http://www.yourteacher.com/geometry/subtractingintegers.php

## Tuesday, April 7, 2009

### Scribepost for April 6th 2009

Math Class For April 6th

For April 6th 2009's math class, the substitute teacher took time in explaining with us the basic introduction to "Integers". So for anyone who was
n't there , or who was there but didn't quite get the notes. "Keep On Reading (:"

The word
"Integer" literally means untouched or
whole in Latin. Integers from the set of "all whole positive and negative numbers and zero".

REMEMBER !

- Positive Integers : Numbers greater than zero

- Negative Integers : Numbers less than zero

Integers are written with a
"positive or negative"
sign in front of the number. eg. - (+1), (-1), +1, -1

NOTE !

Often
positive numbers are written without the (+) .
eg. - +1 can be written as "1"

The sign of
a integer indicates its position relative so zero. eg. of a numbers on a "Cartesian Plane"eg. - 2,2 (q1) , -2,2 (q2) , -2,-2 (q3) , 2,-2 (q4)

Opposite Integers

Every integer has a negative counterpart, when these are added together .. they have a sum of zero. The pairing of opposite integers are also known as
" zero pair".

eg. -
(+1) + (-1) =0

That's The End Of The Note Taking Parts ..

but work wasn't over yet ..

We were all given worksheets about "Integers" with the exceptions of the people who weren't there. If ever you didn't happen to finish it in class, remember that it IS homework.

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