Lesson Plan

Solve "add to" and "take from" word problems with result unknown (e.g., "8 birds are on a fence. 5 more land. How many now?")

Solve "put together" and "take apart" word problems with total unknown or addend unknown (e.g., "There are 14 dogs: 6 are big and the rest are small. How many are small?")

Represent a word problem situation using objects, drawings, or an equation with a symbol (such as ? or ☐) for the unknown

Identify where the unknown is in a word problem - result, change, or start - and set up the matching equation

Use addition and subtraction strategies to solve problems with totals up to 20

1.OA.A.1

1.OA.A.1: Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.