NUMBEROCK
Adding and Subtracting Decimals
The overnight delivery service is scurrying around to get their packages to all of the stores in the city before sunrise. As they drive, they rap and sing about adding and subtracting the decimal values of their various packages. The...
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Adding Decimals of Different Signs
This video shows how to add positive and negative money amounts in the context of a word problem using a number line. Practice problems are available. [3:15]
Math Mammoth
Math Mammoth: Decimal Place Value and Adding Decimals, Up to 2 Decimal Digits
Discusses decimal place value and looks at a misconception students may have about decimal addition and how to clear it up. [8:00]
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: Adding Decimals: 9.087 + 15.31
Demonstrates how to add the decimal numbers 9.087 + 15. 31 using the standard addition algorithm. [2:40]
Khan Academy
Khan Academy: Adding Decimals: 9.087+15.31
Demonstrates how to use vertical addition to find the sum of 9.087 plus 15.31. [2:40]
Khan Academy
Khan Academy: Adding Decimals: 0.822+5.65
Demonstrates how to use vertical addition to find the sum of 0.822 plus 5.65. [1:46]
Virtual Nerd
Virtual Nerd: How Do You Add Decimals?
Video tutorial explores how to add decimals by hand with paper and pencil. [3:18]
Math TV
Math tv.com: Basic Mathematics: Decimals: Multiple Operations
Math students offer step-by-step solutions to solving expressions involving decimal division, multiplication, and addition. In the left-hand menu, click on Basic Mathematics, Decimals, Multiple Operations.
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.
Khan Academy
Khan Academy: Adding Decimals With Hundredths
Sal uses an understanding of place value to add decimals, such as 0.68+0.33. [6:56]
Khan Academy
Khan Academy: Adding Decimals: 9.087+15.31
Sal solves 9.087+15.31 using the "standard algorithm". [2:40]
Khan Academy
Khan Academy: Introduction to Adding Decimals: Tenths
Sal adds tenths, like 0.1+0.8 using visuals and place value. [6:35]
Art of Problem Solving
Art of Problem Solving: Adding Decimals
Video tutorial uses examples to explore how to add decimals. [4:30]
Khan Academy
Khan Academy: Introduction to Adding Decimals: Tenths
Sal adds tenths, like 0.1+0.8 using visuals and place value.
Khan Academy
Khan Academy: Adding Decimals With Ones and Tenths Parts
Sal uses an understanding of place value to add decimals, such as 4+5.7.
Khan Academy
Khan Academy: Adding Decimals With Hundredths
Sal uses an understanding of place value to add decimals, such as 0.68+0.33.
Khan Academy
Khan Academy: Adding Decimals With Ones, Tenths and Hundredths
Sal adds numbers, such as 3.53+4.72, by breaking them down into place values.
Khan Academy
Khan Academy: Adding Decimals: 0.822 + 5.65
Demonstrates how to add the decimal numbers 0.822 + 5.65 using the standard addition algorithm. [1:46]