Download Adding real numbers

Adding
real
numbers
Addition properties
Commutative
2+3= 3+2
a+v= v+a
6 + (-3) = (-3) + 6
Associative
(1 + 2) + 3 = 1 + (2 + 3)
x + (2 + z) = (x + 2) + z
Identity
Inverse
-12 + 0 = -12
M= 0+M
-9 + 9 = 0
Rules
If the signs on the numbers are the
same……. Add the numbers
If the signs on the numbers are
different……. Subtract the numbers
Use the sign on the biggest number
for the sign in your answer
Find the sum
-18 + (-12) + (-19) = -49
-2.6 + (-3.4) + 7.6 = 1.6
8⅔+ (-63/5) = 2 1/15
Evaluate
X + (-2) + (19) when x = -5
-5 + (-2) + (19)
-7 + (19)
12
Pgs 77-78 4-46 even