# Addition and subtraction within 100

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Lessons

Repeated additionAdding 1s and 10sSubtracting 1s and 10sQuiz 1Intro to addition with 2-digit numbersIntro to subtraction with 2-digit numbersQuiz 2Strategies for adding and subtracting within 100Addition within 100Subtraction within 100Quiz 3Word problems within 100Word problems with "more" and "fewer" (within 100)Quiz 4Skip-countingAddition and subtraction missing value problemsUnit testPractice

Quizzes

Unit test

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Repeated addition

4 questions

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Add 2-digit numbers (no regrouping)

7 questions

Practice

Break apart 2-digit addition problems

4 questions

Practice

Regroup when adding 1-digit numbers

7 questions

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Add 2-digit numbers by making tens

25%

25%

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Add 2-digit numbers by making tens 2

0%

0%

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Select strategies for adding within 100

29%

29%

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Add and subtract on the number line word problems

7 questions

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Add and subtract within 100 word problems 1

29%

29%

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Add and subtract within 100 word problems 2

57%

57%

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Skip-count by 5s

7 questions

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Skip-count by 10s

7 questions

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Skip-counting by 100s

7 questions

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**Addition and subtraction within 100**with these 15 questions.About this unit

Learn to add and subtract two-digit numbers within 100.