Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Addition 2
This video covers addition by counting and using a number line, followed by place value concepts and addition of two-digit numbers. Practice problems are available. [12:26]
Khan Academy
Khan Academy: Adding and Subtracting on Number Line
Sal adds and subtracts three-digit numbers less than 1000 using a number line. Includes a video, transcript, and question and answer section. [2:24]
Khan Academy
Khan Academy: Comparing Numbers on the Number Line
Sal uses a number line to compare numbers less than or equal to 10. Includes a video, transcript, and question and answer section. [1:30]
Khan Academy
Khan Academy: Addition and Subtraction With Number Lines
Given a 2-digit addition or subtraction problem, video demonstrates how to decide which number line matches up with it. [1:56]
Khan Academy
Khan Academy: Comparing Whole Numbers
Video lesson shows how to compare the whole numbers 394 and 397 using a symbol. [2:04]
Khan Academy
Khan Academy: Greater Than and Less Than Symbols
Understand how to compare numbers using the greater than symbol ">" and the less than symbol "<". [5:03]
Mucho Math
Algebra2go: Addition on a Number Line
A visual representation of addition on a number line.
Mucho Math
Algebra2go: Rounding Numbers Using a Number Line
The concept of rounding numbers is first demonstrated using a number line. Secondly, the rounding rules are defined.
Mucho Math
Algebra2go: Introduction to Subtraction
Subtraction is visually demonstrated on a number line. Negative numbers are included in this video.
Khan Academy
Khan Academy: Addition and Subtraction With Number Lines
Watch as Sal figures out which number line matches up with a 2-digit addition or subtraction problem. [1:52]
Khan Academy
Khan Academy: Estimating Adding and Subtracting 3 Digit Numbers
Use estimation to find reasonable solutions to addition and subtraction problems.