Adding Decimals Using a Number Line

This lesson teaches how to add decimals using a number line. It begins with a review of number lines and their use in representing whole numbers and fractions. The lesson then explains how to relate fractions and decimals to money for easier understanding. Common mistakes in marking fractions on a number line are discussed. A practical problem involving decimal addition is solved using a number line, with a focus on making smart estimates and visualizing the process step-by-step.

Describe the process of estimating the sum of 1 and 5/10 and 2 and 25 hundredths.

What steps did you take to add the fractions on the number line in the lesson?