What is the identity property of addition?

The identity property of addition states that the sum of any number and zero is that number.

What is the identity property of subtraction?

The identity property of subtraction states that subtracting zero from any number leaves that number unchanged.

What is the commutative property of addition?

The commutative property of addition states that changing the order of the addends does not change the sum.

What is the commutative property of subtraction?

The commutative property does not apply to subtraction; changing the order of the numbers changes the result.

What is the associative property of addition?

The associative property of addition states that the way in which numbers are grouped does not change their sum.

What is the associative property of subtraction?

The associative property does not apply to subtraction; changing the grouping of numbers changes the result.

How do you check your work after solving an addition problem?

You can check your work by reversing the operation, using subtraction to see if you arrive back at the original number.

How do you check your work after solving a subtraction problem?

You can check your work by reversing the operation, using addition to see if you arrive back at the original number.

Flashcard

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Mathematics

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2nd Grade

•

Practice Problem

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Hard

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CCSS

1.OA.B.3, 1.OA.C.6, 1.OA.A.1

Standards-aligned

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15 questions

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FLASHCARD QUESTION

Front

What is the sum of 3 and 2?

Back

Tags

CCSS.2.OA.C.3

FLASHCARD QUESTION

Front

What is 9 minus 7?

Back

Tags

CCSS.1.OA.C.6

FLASHCARD QUESTION

Front

What is 8 minus 6?

Back

Tags

CCSS.1.OA.C.6

FLASHCARD QUESTION

Front

If 9 plus ? equals 18, what is the missing number?

Back

Tags

CCSS.1.OA.A.1

FLASHCARD QUESTION

Front

What is 16 minus 8?

Back

Tags

CCSS.2.OA.A.1

FLASHCARD QUESTION

Front

Define addition in mathematical terms.

Back

Addition is the process of calculating the total of two or more numbers or amounts.

Tags

CCSS.1.OA.A.1

FLASHCARD QUESTION

Front

Define subtraction in mathematical terms.

Back

Subtraction is the process of taking one number away from another.

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