My Math Chapter 2 Vocabulary Review

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What is the Associative Property of Addition?

Back

The Associative Property of Addition states that when adding three or more numbers, the way in which the numbers are grouped does not change the sum. For example, (2 + 3) + 4 = 2 + (3 + 4).

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What is the Commutative Property of Addition?

Back

The Commutative Property of Addition states that changing the order of the numbers being added does not change the sum. For example, 5 + 7 = 7 + 5.

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What is the Identity Property of Addition?

Back

The Identity Property of Addition states that when you add zero to any number, the sum is that number. For example, 0 + 8 = 8.

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What does it mean to regroup in math?

Back

Regrouping means using place value to exchange equal amounts when renaming a number. For example, turning 10 ones into 1 ten.

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What does it mean to estimate a number?

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Estimating means finding a number that is close to the exact answer, often by rounding.

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What is an example of the Associative Property of Addition?

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An example is: 3 + (4 + 5) = (3 + 4) + 5.

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What is an example of the Commutative Property of Addition?

Back

An example is: 6 + 2 = 2 + 6.

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What is an example of the Identity Property of Addition?

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An example is: 0 + 15 = 15.

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What is the term for a number that is not known?

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The term is 'unknown'.

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What does 'reasonable' mean in math?

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In math, 'reasonable' refers to an answer that makes sense based on the context of the problem.