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## Subtracting 2 Digit Numbers - no regrouping

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Subtraction using the standard algorithm.

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

## Subtracting 3 Digit Numbers - with Regrouping

00:00

Subtraction using the standard algorithm.

Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

## Subtracting 2 Digit Numbers - with Regrouping

00:00

Subtraction using the standard algorithm.

Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

## Subtract 3 Digit Numbers without Regrouping

00:00

Subtraction using the standard algorithm.

Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.

## Double Digit Subtraction

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Apply properties of operations as strategies to add and subtract.5  Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.)

## Triple Digit Subtraction Across Zeros

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Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

## Double Digit Subtraction with Regrouping

00:00

Subtraction using the standard algorithm.

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

## Subtracting 7 Digit Whole Numbers with Regrouping

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Fluently add and subtract multi-digit whole numbers using the standard algorithm.

## Subtracting 7 Digit Whole Numbers without Regrouping

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Fluently add and subtract multi-digit whole numbers using the standard algorithm.

## Subtracting 5 Digit Whole Numbers without Regrouping

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Fluently add and subtract multi-digit whole numbers using the standard algorithm.