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Line 8:
Line 8: − +
4 + 5 = 5 + 4
:For example <big><math>3\times 2 = 2\times 3</math></big>.
:For example <big><math>3\times 2 = 2\times 3</math></big>.
:Likewise <big><math>4 + 5 = 5 + 4</math></big>
They are both therefore called "[[commutative]]" operations
They are both therefore called "[[commutative]]" operations