Operations & Algebraic Thinking
2.OA.B.2
2nd Grade · Common Core Standards
Standard
Fluently add and subtract within 20 using mental strategies.2 By end of Grade 2, know from memory all sums of two one-digit numbers.
Study materials
Parent guide, study guide, practice problems, review, and practice test for this standard.
- Word ProblemsComing soon
- Mixed PracticeComing soon
- Multi-Step ProblemsComing soon
- Multi-Standard ProblemsComing soon
- Multi-Step Multi-StandardComing soon
- ReviewComing soon
- Practice TestComing soon
- Answer keyComing soon
Interactive practice
Quizzes, typed answers, and flashcards for this standard — coming soon.
- Coming soon
Quiz
Multiple-choice questions with instant feedback
- Coming soon
Typed practice
Type answers and check them
- Coming soon
Flashcards
Vocabulary and key facts
- Coming soon
Mixed quiz
Harder mixed review for this standard
© Common Core State Standards Initiative. Used under CC BY 4.0. See thecorestandards.org for the official standards.