Do the following problems without your calculator, using the properties of
addition to help you.
Problem : 46 + 78 + 54 = ?
178
Problem : (56 + 7) + 13 = ?
76
Problem : 67 + 11 + 21 + 68 = ?
167
Problem : (52 + 85) + (5 + 3) = ?
145
Problem : 34 + 0 + 54 + 26 + 18 + 6 = ?
138
Which properties of addition (Associative, Commutative,
Identity)
are used in the following?
Problem : (5 + 64) + 6 = 5 + (64 + 6)
Associative Property
Problem : (5 + 64) + 6 = (64 + 5) + 6
Commutative Property
Problem : 117 + 0 + 65 = 117 + 65
Identity Property
Problem : 54 + 2 + 7 + 1 = 1 + 2 + 7 + 54
Commutative Property
Problem : 2 + (3 + 4) + 5 = (2 + 3) + (4 + 5)
Associative Property
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