Lesson: Word Problems: Adding Three Numbers Mathematics • 1st Grade

In this lesson, we will learn how to solve problems by adding three numbers with sums up to 20 and write equations to represent the problem.

Lesson Plan

Students will be able to

read and interpret a word problem involving the addition of 3 numbers,
write an equation to represent a word problem involving the addition of 3 numbers,
solve a word problem by choosing an appropriate strategy to add three numbers in any order,
find a missing addend to solve a word problem where three numbers are added.

Q1:

A person has 2 white puppies, 2 brown cats, and 7 black puppies. How many puppies do they have?

Q2:

Find the group with 5 balloons.

Q3:

William has 15 cars colored red, blue, and green.

Which of these could be his car collection?