Properties of Addition
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Commutative property: When two numbers are added together, the order of addends does not affect the sum or result. For example, 8 + 4 = 4 + 8.
Associative Property: When three or more numbers are added, the grouping of addends does not affect the sum or result. For example, 4 + (3 + 7) = (4 + 3) + 7.
Identity Property: The sum of zero and any other number is the number itself. For example, 5 + 0 = 5.
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The correct answer is
The smallest number is the one that comes first while counting.
To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.
21 is the smallest number.