Lessons for 2.OA.A.1
Addition and subtraction problems in wordsStories whose structure decides which operation finds the missing amount.Lesson
Bar models for story problemsA bar split into parts shows how the numbers in a story fit together, which shows whether to add or subtract.Lesson
Problems with the start, change or result missingStories that give a start and an end and ask what happened in between.Lesson
How many more and how many fewerStories that ask for the gap between two amounts.Lesson
Problems with the total missingStories that give both parts and ask for the whole.Lesson
Problems with the starting amount missingStories that give the change and the end and ask where things began.Lesson
Two-step addition and subtraction problemsStories that need one answer worked out before the next.Lesson
Printable Worksheets
Bar models for story problems worksheet (PDF)Printable worksheet with answer keyPreview
Problems with the start, change or result missing worksheet (PDF)Printable worksheet with answer keyPreview
How many more and how many fewer worksheet (PDF)Printable worksheet with answer keyPreview
Problems with the total missing worksheet (PDF)Printable worksheet with answer keyPreview
Problems with the starting amount missing worksheet (PDF)Printable worksheet with answer keyPreview
Two-step addition and subtraction problems worksheet (PDF)Printable worksheet with answer keyPreview