Lumos Video Store
This page provides a list of educational videos related to Adding Decimals. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Adding Decimals.
Adding and subtracting decimals word problems
By Khan Academy
Let's get fancy and practice adding and subtracting decimals in the same word problem.
Adding and subtracting decimals word problems
By Khan Academy
Here's a simple word problem asking us to put our adding decimals skill to work. We sound like a broken record, but be sure and ALIGN DECIMALS.
Adding decimals 2
By Khan Academy
We're adding 3 decimal numbers together in this example. Give it a try!
Adding Decimals - Within a Word Problem
By Khan Academy
Here's a simple word problem asking us to put our adding decimals skill to work. We sound like a broken record but be sure and ALIGN DECIMALS.
Adding and Subtracting Decimals
By TeacherTube Math
This video is from the TeacherTube website and the instructor shows how to add and subtract decimals. She shows how to line up the decimal points in the numbers. Instructor appears to be using computer software for demonstration.
Adding Decimals | MathHelp.com
By MathHelp.com
MathHelp.com offers is your complete solution for understanding Geometry. We offer a custom Geometry course as well as custom courses for over 100 standardized tests, including COMPASS, ASVAB, ACCUPLACER, PRAXIS, SAT, GED, GRE, and many more.
DEPRECATED Rational number word problems
By Khan Academy
Your checking account is overdrawn. Not good. Use your knowledge of decimals and adding negative and positive numbers to bring your account back into the black.
Math Ratios | MathHelp.com
By MathHelp.com
This lesson covers adding decimals. Students learn to add decimals by first lining up the decimal points, then adding the numbers by column. For example, to add 14.2 + 2.86, first line up the decimal points, then add the digits in the hundredths column, to get 0 + 6, or 6, then add the digits in the tenths column, to get 2 + 8, or 10, so write a 0 in the tenths column and carry the 1 to the units column, then add the digits in units column, to get 1 + 4 + 2, or 7, then add the digits in the tens column, to get 1. So 14.2 + 2.86 = 17.06.
Addition and subtraction with significant figures | Decimals | Pre-Algebra | Khan Academy
By Khan Academy
This video shows us the rules for adding and subtracting measurements to show our level of accuracy. Note that the rules for addition/subtraction with significant figures are VERY different than the rules for mulitplication/division. Think about which number is the most precise!