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Unit 4: Addition and subtraction within 20
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About this unit
Math can be a blast! In this unit, you'll learn about adding and subtracting numbers up to 20. That might sound tricky, but you'll have all the tools to help you out. Place value blocks, ten frames, arrays, and number lines can all make solving words problems a snap.Learn
Practice
- Add within 20 visuallyGet 5 of 7 questions to level up!
- Add within 20Get 5 of 7 questions to level up!
- Add 3 numbersGet 5 of 7 questions to level up!
Learn
Practice
- Subtract within 20 visuallyGet 5 of 7 questions to level up!
- Subtract within 20Get 5 of 7 questions to level up!
Practice
- Equal signGet 5 of 7 questions to level up!
Practice
- Find missing number (add and subtract within 20)Get 5 of 7 questions to level up!
Learn
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!
Learn
Practice
- Adding with arraysGet 3 of 4 questions to level up!
- Array word problemsGet 3 of 4 questions to level up!
Up next for you:
Level up on all the skills in this unit and collect up to 1300 Mastery points!