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Learning Math Home
Number and Operations Session 1: What Is a Number System?
 
Session 1 Part A Part B Part C Homework
 
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Session 1, Part A:
A Simpler Number System

In This Part: Addition in Units Digit Arithmetic | Inverse, Identity, and Closure
Multiplication in Units Digit Arithmetic | Multiplicative Inverse and Identity

Problem A8

  

Fill in the multiplication table below using units digit arithmetic. For example, in our regular system, 6 • 3 = 18. But in units digit arithmetic, we are only interested in the units digit, so in this system, 6 • 3 = 8.

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9

show answers

 

Problem A9

Solution  

a. 

What patterns do you observe among the numbers in your table?

b. 

Why do you think these patterns occur?


Next > Part A (Continued): Multiplicative Inverse and Identity

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