9 + 9 + 9 + 1 + 6 + 5 = 39
5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 9 + 9 + 9 + 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 - 1 = 43
3 + 5 + 9 + 5 + 5 + 5 + 5 + 6 + 4 = 37
Yes because they all add up to 18
9 + 6 + 9 + 6 + 9 + 8 + 5 + 2 + 9 + 8 + 7 + 6 + 5 + 4 + 3 + 2 + 1 = 99
5 +9 = 9 + 5 is an example of arithmetic commutativity
5 + 6 + 9 = 20
5+9+1 = 15
9*5=45 or 5+5+5+5+5+5+5+5+5=45 or1*5*9=45
9+5=14.
-5 + 9 = 4
44 - 9 + 6 + 5 + 4 + 32 + 5 = 87