## Rounding to nearest 10 or 100

Learn
Rounding to the nearest 10 on the number lineRounding to the nearest 100 on the number lineRounding to nearest 10 and 100
Practice
Round to nearest 10 or 100 on the number lineGet 5 of 7 questions to level up!
Round to nearest 10 or 100Get 3 of 4 questions to level up!
Round to nearest 10 or 100 challengeGet 3 of 4 questions to level up!

## Estimate to add multi-digit numbers

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Practice
Estimate to add multi-digit whole numbersGet 3 of 4 questions to level up!

## Strategies for adding two and three-digit numbers

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Practice
Break apart 3-digit addition problemsGet 3 of 4 questions to level up!
Add using groups of 10 and 100Get 3 of 4 questions to level up!
Add on a number lineGet 3 of 4 questions to level up!
Select strategies for adding within 1000Get 3 of 4 questions to level up!

## Adding with regrouping within 1000

Learn
Using place value to add 3-digit numbers: part 1Using place value to add 3-digit numbers: part 2Adding 3-digit numbers
Practice
Add within 1000Get 3 of 4 questions to level up!

## Estimate to subtract multi-digit numbers

Learn
Estimating when subtracting large numbers
Practice
Estimate to subtract multi-digit whole numbersGet 3 of 4 questions to level up!

## Strategies for subtracting two and three-digit numbers

Learn
Subtraction by breaking apartAdding and subtracting on number lineMethods for subtracting 3-digit numbers
Practice
Break apart 3-digit subtraction problemsGet 3 of 4 questions to level up!
Subtract on a number lineGet 3 of 4 questions to level up!
Select strategies for subtracting within 1000Get 3 of 4 questions to level up!

## Subtracting with regrouping within 1000

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Worked example: Subtracting 3-digit numbers (regrouping) Subtracting 3-digit numbers (regrouping) Worked example: Subtracting 3-digit numbers (regrouping twice)Worked example: Subtracting 3-digit numbers (regrouping from 0)
Practice
Subtract within 1000Get 3 of 4 questions to level up!

## Addition and subtraction missing value problems

Learn
Missing number for 3-digit addition within 1000Missing number for 3-digit subtraction within 1000
Practice

## Addition and subtraction word problems

Learn
Three digit addition word problemsThree digit subtraction word problems
Practice
Add and subtract within 1000 word problemsGet 3 of 4 questions to level up!