1. Double negative = positive
Ex. 5 - (-3)
= 5 + 3
= 8
2. A negative and positive = negative
Ex. 7 + (-2)
= 7 - 2
= 5
Tips
Ex. 5 + (-3) - (-4) - (+2) + (-7) + (+1)
= 5 - 3 + 4 - 2 - 7 + 1
= 10 - 12
= 2
An interesting, relevant-to-this-tumblr comic.
This a very funny website, which I recommend to all who don’t mind some scientific humour.
Website: http://xkcd.com/
Equations:
Ex.1
(-3) + (-8) = ?
Ex.2
(4) - (6) = ?
Ex.3
(-7) - (6) = ?
Ex.4
(-5) + (1) = ?
Equations:
Ex.1
-3 + (-6) = -9
Ex.2
(-7) + 9 = 2
Ex.3
1 (-3) = -12
Ex.4
(-12) - (2) = 14
in·te·ger
noun /ˈintijər/
integers, plural
A whole number; a number that is not a fraction
A thing complete in itself
"— The Dictionary
Adding/Subtracting negative integers.
— Tendai Chitewere
Adding integers with different signs.
(Source: youtube.com)
Adding integers with the same sign.
(Source: http)
Made up of all things integers -- especially that which you need to know for Grade 9 IB/Academic exams.
- Mairi and Madeline
Me: I finally got...
