# 2.OA.B.2 Worksheets, Workbooks, Lesson Plans, and Games

#### CCSS.maths.CONTENT.2.OA.B.2

:
"Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers."

Our Take:Adding and subtracting within 20 should become quick and easy work for students by the end of year three. Give students plenty of repetition through various types of worksheets and games to hone this skill.

These worksheets can help students practise this Common Core State Standards skill.

## Worksheets

Electoral Vote
Worksheet
Electoral Vote
See how electoral votes work in the United States presidential election.
Year 3
Social studies
Worksheet
By the Numbers!
Worksheet
By the Numbers!
Looking for a fun way to practise your child's addition skills? Go by the numbers with this maths riddle worksheet.
Year 3
Maths
Worksheet
Janitor Jane
Worksheet
Janitor Jane
Searching for a fun worksheet that challenges your child's maths skills? This printable will get them adding their way through a maze!
Year 3
Maths
Worksheet
Snail Fact Families
Worksheet
Snail Fact Families
Kids add, subtract, or use maths facts they have committed to memory to fill in the missing numbers in the fact families on this year three maths worksheet.
Year 2
Maths
Worksheet
Addition Puzzle: Impossible Sum
Worksheet
Addition Puzzle: Impossible Sum
This addition puzzle is a great maths challenge. Experiment with the number combinations to find the requested sums.
Year 3
Maths
Worksheet
Subtraction Facts Review
Worksheet
Subtraction Facts Review
Ensure your third grader has a solid subtraction foundation with this subtraction facts worksheet that's packed with extra practise.
Year 3
Maths
Worksheet

## Lesson Plans

Addition: Over in a Flash
Lesson plan
Addition: Over in a Flash
Encourage your students to take part in some friendly competition with this game that has students practise their addition skills with flashcards.
Year 2
Maths
Lesson plan
What's the Difference?
Lesson plan
What's the Difference?
Give your students a great basis in mathematics with this lesson that has them use a number line to find differences for basic subtraction facts.
Year 3
Maths
Lesson plan
Lesson plan
This scaffolded EL lesson will help your students fluently add within 20, while reinforcing parts of a whole. Use as a pre-lesson for Addition: Over in a Flash, or as a stand alone activity.
Year 3
Maths
Lesson plan

## Workbooks

No workbooks found for this common core node.

## Games

Ski Race: Subtraction Within 20
Game
Ski Race: Subtraction Within 20
Kids tackle subtraction to 20 in this silly maths game.
Year 3
Maths
Game
Bubble Buster: Addition to 20
Game
Bubble Buster: Addition to 20
Kids must move fast to find addition pairs that total a target sum within 20.
Year 3
Maths
Game
Game
To help Roly move through obstacles, kids learn a regrouping strategy to make addition within 20 easily!
Year 2
Maths
Game

## Exercises

Addition Facts Within 20
Exercise
Addition Facts Within 20
Limit addition to within 20 for students new to two digit addition in this engaging exercise.
Year 4
Maths
Exercise

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