The commutative property of addition states that the order in which two numbers are added does not change their sum.
In general, for all terms or numbers a and b, a + b = b + a
6 + 1 = 1 + 6
7 + 8 = 8 + 7
x + y = y + x
16 + k = k + 16
2length + 2width = 2width + 2length
p + 8j = 8j + p
2/3 + 4/9 = 4/9 + 2/3
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