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Tuesday, January 21, 2014

Lizley's Scribe Post

Adding Integers

ex.
(+5) + (-2) = ?

How to add Integers:

1. Add these to help you out:
+5 = have 5
-2 = owe 2

2. +5 = +++++
     -2 = --

*The rest is 3 +'s. So the answer is +3

(+5) + (-2) = +3

ex.
(+6) + (-4) = +2
have 6  &   owe 4  = have 2
++++++
- - - -

Subtracting Integers

ex.
5 - 2 = +3
have 5 remove owe 2 = have 3

so it becomes..
5(-2) = +3

then use +s & -s

5(-2) = +3
+++++
--


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