Lesson: Adding Decimals with Tenths: The Column Method Mathematics • 5th Grade

In this lesson, we will learn how to use the column method to add numbers with one decimal place with and without regrouping.

Lesson Plan

Students will be able to

use place value models to regroup when adding two decimals with one decimal place,
make connections between concrete models used to add two decimals with one decimal place and the written column method,
add two decimals with one decimal place without regrouping using the column method,
add two decimals with one decimal place with regrouping using the column method,
solve word problems involving adding two decimals with one decimal place.

Q1:

One basket contains 24.1 kg of apples. Another basket contains 21.5 kg of apples. What is the total weight of the apples in the baskets?

Q2:

Use the column method to solve the following:

Q3:

Find the result of the following: