Lesson: Two-Step Problems with Bar Models: Numbers up to 100 Mathematics

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In this lesson, we will learn how to solve two-step addition and subtraction problems with numbers up to 100 by drawing part–whole and comparative bar models.

Lesson Plan

Students will be able to

model each step of a two-step word problem with a comparison or part–whole bar model,
write an equation for each step in a word problem using bar models,
decide whether to use addition or subtraction to solve each step in a word problem,
solve two-step word problems.