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Operations
Problems
Do the following problems without your calculator, using the properties of
addition to help you.
Problem 2.1:
46 + 78 + 54 = ?
[Solution]
Problem 2.2:
(56 + 7) + 13 = ?
[Solution]
Problem 2.3:
67 + 11 + 21 + 68 = ?
[Solution]
Problem 2.4:
(52 + 85) + (5 + 3) = ?
[Solution]
Problem 2.5:
34 + 0 + 54 + 26 + 18 + 6 = ?
[Solution]
Which properties of addition (Associative, Commutative,
Identity)
are used in the following?
Problem 2.6:
(5 + 64) + 6 = 5 + (64 + 6)
[Solution]
Problem 2.7:
(5 + 64) + 6 = (64 + 5) + 6
[Solution]
Problem 2.8:
117 + 0 + 65 = 117 + 65
[Solution]
Problem 2.9:
54 + 2 + 7 + 1 = 1 + 2 + 7 + 54
[Solution]
Problem 2.10:
2 + (3 + 4) + 5 = (2 + 3) + (4 + 5)
[Solution]
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