• October revision year 4
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  • a) (14 + 6) + 21 = 14 + (6 + ………………….) , --------------------- property of addition
    21 , Associative property of addition
  • b) 33 + 16 = 16 + 33 , ---------------------property of addition.
    commutative
  • c) 28 + 0 = 28 , ---------------------property of addition.
    identity
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