Lesson: Two-Step Problems with Bar Models: Numbers up to 100 Mathematics • 2nd Grade

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.

Lesson Video

Lesson Worksheet

Q1:

Noah and Benjamin were seeing who could run farther in 10 seconds. Noah only ran 18 meters because he tripped over. Benjamin ran 62 meters farther than Noah.

How many meters did Benjamin run?

How many meters did the boys run in total?

Q2:

James’s sticker book contained 62 stickers. He bought a new pack of 12 stickers and found that he already had 5 of those stickers in his book. He stuck the stickers he did not already have into his book.

Pick one way to calculate the number of stickers in his book now.

Q3:

There were 68 biscuits in a box. A boy ate 43 biscuits, and his sister ate 12. How many biscuits did they eat, and how many are left?