Plans and Worksheets for Grade 2
Plans and Worksheets for all Grades
Lessons for Grade 2
Common Core For Grade 2
Examples, solutions, videos, and songs to help Grade 2 students learn how to fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
Common Core: 2.OA.2
Suggested Learning Target
2.OA.2 - Mental Math Strategies: Make 10
- I can use mental strategies (e.g., count on, make a ten) to add or subtract numbers within 20 with ease.
- I can recall from memory all sums of two one-digit numbers.
How to use mental strategies to add within 20 using the "make 10" strategy. This is one of the strategies suggested in the Common Core State Standards for Mathematics, 2.OA.2.
2.OA.2 - Mental Math Strategies: Use Known Equivalent Sums
How to use mental strategies to add within 20 using known sums to solve unknown sums?
2.OA.2 - Mental Math Strategies: Addition & Subtraction Relationship
How to use mental strategies to add and subtract within 20 using the relationship between addition and subtraction?
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