# Addition and subtraction

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Lessons

Basic addition and subtractionMaking 10Addition and subtraction word problems within 10Quiz 1Addition and subtraction within 20Word problems within 20Word problems with "more" and "fewer"Quiz 2Intro to addition with 2-digit numbersIntro to subtraction with 2-digit numbersStrategies for adding and subtracting within 100Quiz 3Addition within 100Subtraction within 100Word problems within 100Quiz 4Adding 1s, 10s, and 100sSubtracting 1s, 10s, and 100sStrategies for adding 2- and 3-digit numbersQuiz 5Addition with regrouping within 1000Subtraction with regrouping within 1000Addition and subtraction missing value problemsQuiz 6Addition and subtraction greater than 1000Unit testPractice

Quizzes

Unit test

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Practice

Add within 5

100%

100%

Subtract within 5

100%

100%

Add within 10

100%

100%

Subtract within 10

100%

100%

Relate addition and subtraction

100%

100%

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Add within 20

100%

100%

Subtract within 20

100%

100%

Find missing number (add and subtract within 20)

57%

57%

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Add 2-digit numbers (no regrouping)

71%

71%

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Break apart 2-digit addition problems

100%

100%

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Regroup when adding 1-digit numbers

86%

86%

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Practice

Add 2-digit numbers by making tens

75%

75%

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Add 2-digit numbers by making tens 2

0%

0%

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Select strategies for adding within 100

71%

71%

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Add within 100

71%

71%

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Practice

Add and subtract on the number line word problems

7 questions

Practice

Add and subtract within 100 word problems 1

43%

43%

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Add and subtract within 100 word problems 2

71%

71%

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Practice

Break apart 3-digit addition problems

50%

50%

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Add using groups of 10 and 100

0%

0%

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Add and subtract on a number line

50%

50%

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Add within 1000

25%

25%

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Test your understanding of

**Addition and subtraction**with these 15 questions.About this unit

In this topic, we will add and subtract whole numbers. The topic starts with 1+1=2 and goes through adding and subtracting within 1000. We will cover regrouping, borrowing, and word problems.