# Subtraction in different bases

Taught by muchomath
• Currently 3.0/5 Stars.
6471 views | 3 ratings
Part of video series
Meets NCTM Standards:
Lesson Summary:

In this lesson on "Subtraction in Different Bases", Professor Perez demonstrates how to subtract with borrowing in bases other than 10. He shows examples in base 8, base 4, and base 2, noting that the number being borrowed changes depending on the base. While it may seem daunting, with practice, anyone can master the technique of subtracting in different bases.

Lesson Description:

Subtraction with a lot of borrowing in different bases.

Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.

Questions answered by this video:
• How do you subtract numbers and borrow in base 8, base 4, and base 2?
• How do you subtract 45554 - 16365 in base 8?
• How do you subtract 10021 - 3223 base 4?
• How do you know how many to borrow when using different bases?
• How do you subtract 111011 - 11111 base 2?
• How do you subtract numbers in base 2 if you need to borrow?
• #### Staff Review

• Currently 3.0/5 Stars.
This is the final of the 3-part series on adding and subtracting numbers in different bases. This lesson is about subtracting numbers with borrowing in other bases. Many good examples are shown with an abacus. This really helps students see clearly how this operation works.
• #### lfil31

• Currently 1.0/5 Stars.
What is this? I'm sorry, I can't learn like this. It would be nice if the video just got straight to the point rather than annoying me with this failed attempt at entertainment.
• #### kimmiehavinfun

• Currently 5.0/5 Stars.
I love it! This video, and all videos by Perez, are awesome. As an adult learner, I really connected to his explanation and humor!