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In the lesson, Addition of Decimal Numbers and a Common Error, Students practice carefully lining up decimal places while calculating sums of decimals that total more than one.

Investigations/Scott Foresman (2006)
Name That Part,
Investigation 1, Session 4: pp. 2--3
Between Never and Always
Investigation 1, Sessions 1 and 2, pp. 4-18
Measurement Benchmark
Investigation 1, pp. 25-37

Here are some Frame, Focus and Follow-up suggestions for using this video in a math lesson.

What is Frame, Focus and Follow-up?

Here are some suggestions for using this video:

Frame: When people keep track of mileage, a lot of times they use the odometer in their car. This device records the distance the car has traveled. Some odometers display only whole numbers while other odometers include the parts of each mile. What kind of numbers do you think odometers use to record the parts of a mile?

Focus: While watching the segment, try to spot the mistake Bianca makes when she adds the distance she has to travel before the turn to her current mileage. See if you can figure out what the odometer reading should have been in order for her to make the turn at the right place.

Follow Up: What was the addition problem Bianca should have done? What addition problem did she do instead? What was the error she made that created the incorrect equation? If you had to add a whole number and a decimal number, could you do it in your head or would you need to write it down?