Logo Teacher Advisor With Watson
  • Grades
    • Kindergarten
      • Standards
      • Lessons
      • Activities
      • Strategies
    • 1st Grade
      • Standards
      • Lessons
      • Activities
      • Strategies
    • 2nd Grade
      • Standards
      • Lessons
      • Activities
      • Strategies
    • 3rd Grade
      • Standards
      • Lessons
      • Activities
      • Strategies
    • 4th Grade
      • Standards
      • Lessons
      • Activities
      • Strategies
    • 5th Grade
      • Standards
      • Lessons
      • Activities
      • Strategies
    • 6th Grade
      • Standards
      • Lessons
      • Activities
      • Strategies
    • 7th Grade
      • Standards
      • Lessons
      • Activities
      • Strategies
    • 8th Grade
      • Standards
      • Lessons
      • Activities
      • Strategies
  • About Teacher Advisor
  • Login
  • Sign Up
  • Menu
2nd Grade
2Grade
  • Standards
  • Lessons
  • Activities
  • Strategies
  • Nav to map page
    MAP

Math Standard 2.OA.B.2

  • Major Standards
  • Supporting Standards
  • Additional Standards

Fluently add and subtract within 20 using mental strategies (See standard 1.OA.6 for a list of mental strategies). By end of Grade 2, know from memory all sums of two one-digit numbers.

Part of Major Cluster 2.OA.B
View 8 lessons for this standard
View 118 activities for this standard
  • Related Standards
  • Tasks
  • Teaching Strategies
  • Differentiation Strategies

Prerequisites

1st Grade

1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).

Upcoming Standards

2nd Grade

2.NBT.B.5

Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

You found the bottom! Thanks for choosing Teacher Advisor

Get Support
About Teacher Advisor
Powered by IBM logo