New Mexico State University
Number Rights
You do not have to be whole to be important. Individuals watch a video on the importance of rational numbers on the number line. Scholars use their knowledge to rename numbers on the number line as well as place rationals on a number...
CK-12 Foundation
Ck 12: Elem Math: Adding and Subtracting Decimals Word Problems
[Free Registration/Login may be required to access all resource tools.] This is a video that shows how to solve both an addition and subtraction problem with decimals.
Math Mammoth
Math Mammoth: Add and Subtract Decimals Mentally (With Up to 3 Decimal Digits)
A lesson in how to add and subtract decimals to the thousandths place using mental math. [10:40]
Khan Academy
Khan Academy: Multiplying Challenging Decimals
Demonstrates how to multiply decimals to the thousandths place using the example of 1.21 x 0.043. [4:25]
Math TV
Math tv.com: Basic Mathematics: Decimals: Addition and Subtraction
Math students offer step-by-step solutions to problems involving decimal addition and subtraction. In the left hand menu, click on Basic Mathematics, Decimals, Addition and Subtraction.
Imagine Learning Classroom
Learn Zillion: Multiply Decimals to the Hundredths by Using Fractions
In this lesson, you will learn how to multiply decimals by using fractions. [2:49]
Imagine Learning Classroom
Learn Zillion: Estimate the Addition and Subtraction of Decimals
In this lesson, you will learn how to estimate the addition and subtraction of decimals by using smart rounding. [4:23]
Imagine Learning Classroom
Learn Zillion: Divide Decimals by Using a Number Line
In this lesson, you will learn how to divide decimals by using a number line. Login gives access to a slideshow and additional videos. [2:22]
Khan Academy
Khan Academy: More Advanced Subtraction Strategies With Hundredths
Sal uses place value and numbers in expanded form to subtract decimal to hundredths, such as 8.38-4.54. [5:01]
Khan Academy
Khan Academy: Strategies for Subtracting More Complex Decimals With Tenths
Sal uses place value and decomposing numbers to subtract decimals to the tenths place, such as 2-1.2. [8:45]
Khan Academy
Khan Academy: Multiplying Decimals: Multiplying Decimals 3
This video shows how to multiply two decimals in the context of a word problem.
Khan Academy
Khan Academy: Strategies for Subtracting More Complex Decimals With Tenths
Sal uses place value and decomposing numbers to subtract decimals to the tenths place, such as 2-1.2.
Khan Academy
Khan Academy: Strategies for Subtracting Basic Decimals
Sal uses place value and a number line to subtract decimals, such as 1.5-0.7.
Khan Academy
Khan Academy: Subtraction Strategies With Hundredths
Sal uses place value and decomposing numbers to subtract decimals, such as 65.79-42.58.
Khan Academy
Khan Academy: More Advanced Subtraction Strategies With Hundredths
Sal uses place value and numbers in expanded form to subtract decimal to hundredths, such as 8.38-4.54.
Khan Academy
Khan Academy: Multiplying and Dividing Decimals by 10
Learn to multiply and divide decimals by 10 using fraction and place value understanding.
Khan Academy
Khan Academy: Developing Strategies for Multiplying 2 Digit Decimals
Sal uses place value and equivalent mixed numbers to multiply decimals.
Khan Academy
Khan Academy: Division Strategies for Decimal Quotients
Sal uses an understanding of place value and fractions to introduce dividing with decimals.
Khan Academy
Khan Academy: Pattern When Dividing by Tenths and Hundredths
Sal illustrates patterns by dividing decimals by the tenth and hundredths.
Khan Academy
Khan Academy: Developing Strategies for Multiplying Decimals
Sal uses place value and equivalent fractions to multiply decimals.