Lesson: Modeling Two-Step Addition and Subtraction Problems Mathematics • 2nd Grade

In this lesson, we will learn how to decide which operations are needed to solve a two-step word problem by drawing a model if necessary and how to write equations to record the solution with numbers up to 1000.

Lesson Plan

Students will be able to

draw part–whole and comparison bar models to represent a word problem,
identify which operation to use to solve each step of the problem,
add and subtract within 1,000 to solve multistep problems.

Lesson Worksheet

Q1:

A mailman has to deliver letters to 76 houses. In the first street, he delivered to 28 houses, and, in the next street, he delivered to 15 houses.

Pick one way to calculate the number of houses that are left.

Q2:

A book has 730 pages. The reader read 574 pages yesterday and 145 pages today. How many pages are left?

Q3:

I am a number. If you add me to 952 and then subtract 167, I become 822. What number am I?