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Integers
Adding and Subtracting
Integers
Post the following letters on the corresponding spots on your number line
a)The opposite of -3
b)The same distance from 0 as +6
c)The number with no opposite
d)4 degrees below zero
e)The bottom of a hole 5 m deep
f)$8 in savings
The atom contains electrons, protons, and neutrons. Just like integers, when added together you are left with a positive, negative, or neutral charge (an integer).
Integers
Applications in real life.
Integers
Adding positive integers
(+3) + (+7)= +10
Adding positive integers is basic mathematics, you simply add the numbers together.
Imagine adding 2 positive charges together.
An integer is any positive/negative whole number and zero.
Try This
12 + (-2) = ?
9 + (-4) = ?
24 + (-10) = ?
Find the following pattern
(+15) + (-3) = 12
(+12) + (-3) =9
(+9) + (-3) = 6
(+6) + (-3) = 3
(+3) + (-3) = 0
0 + (-3) = ?
(-3) + (-3) =?
(-6) + (-3) =?
(-9) + (-3) = ?
Continue the pattern
What rule can you come up with about adding a negative integer to a positive integer?
Adding negative and positive integers together
Using a number line :).
Adding negative integers together
When 2 negative integers are added together they give a negative number.
Imagine adding 2 negative charges together. You would simply get the sum of the 2 negative charges.
(-3) + (-4) = -7 (-10) + (-5) = -15
Adding Integers Review
a) (+3) + (+5)
b) (-3) + (-1)
c) (-7) + (+4)
d) (+8) + (-11)
e) (+3) + (-4) + (-2)
Homework
Page 63
Questions 58-65
Page 119
Questions 15-31