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Unit 4: Addition and subtraction within 20

1,300 possible mastery points

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.
Level up on the above skills and collect up to 400 Mastery points

Practice

Level up on the above skills and collect up to 160 Mastery points
Level up on the above skills and collect up to 320 Mastery points
Up next for you:

Unit test

Level up on all the skills in this unit and collect up to 1300 Mastery points!