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Unit 2: Addition and subtraction
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About this unit
First, we will learn how addition and subtraction relate. Next, we will add and subtract numbers less than or equal to 20 and solve addition and subtraction word problems. Finally, we will begin adding 2-digit numbers.Practice
- Relate addition and subtractionGet 5 of 7 questions to level up!
Practice
- Add within 20Get 5 of 7 questions to level up!
- Add 3 numbersGet 5 of 7 questions to level up!
Practice
- Subtract within 20Get 5 of 7 questions to level up!
Practice
- Equal signGet 5 of 7 questions to level up!
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Practice
- Find missing number (add and subtract within 20)Get 5 of 7 questions to level up!
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Practice
- Addition and subtraction word problems 1Get 5 of 7 questions to level up!
- Addition and subtraction word problems 2Get 5 of 7 questions to level up!
Learn
Practice
- Add and subtract within 20 word problemsGet 5 of 7 questions to level up!
- Word problems with "more" and "fewer" 2Get 5 of 7 questions to level up!
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Practice
- Add 1 or 10Get 5 of 7 questions to level up!
- Add 1s or 10s (no regrouping)Get 5 of 7 questions to level up!
Learn
Practice
- Adding up to four 2-digit numbersGet 3 of 4 questions to level up!
- Break apart 2-digit addition problemsGet 3 of 4 questions to level up!
- Regroup when adding 1-digit numbersGet 5 of 7 questions to level up!
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