Lesson review
- A numeral is a representation of a number.
- Base number systems
- Base (radix, or scale)
Homework
- p.142 Ex.8.2.1(a) (d)
- p.145 Ex.8.3.1(b), 8.3.2(c), 8.3.3, 8.3.6(a)(d)(g)
- p.148 Ex.8.4.2
- p.152 Ex.8.5.2(a)(c), 8.5.3(a), 8.5.4
- P158 Ex.8.6.2 (a,c,d,e), 8.6.4
- p160 Ex.8.23
- Ex. 8.6.2, please use a “smart” way to convert. For example, from 3^2 to 3, from 2^4 to 2, from n to n-1, try to think about the methods we explained in the class.
- Extra Resources
- https://www.khanacademy.org/math/algebra-home/alg-intro-to-algebra/algebra-alternate-number-bases/v/number-systems-introduction
- https://www.youtube.com/watch?v=nEBKpX8JZ04
- https://www.youtube.com/watch?v=jxC7_0dqHT4
- https://www.mathsisfun.com/numbers/bases.html
- https://betterexplained.com/articles/numbers-and-bases/
*Another way to determine Perfect/Abundant/Deficient Number
Thanks to Jason’s Daddy’s sharing!
for example, 300 = 2^2 × 3 × 5^2.
The sum of all positive divisors of 300
=(4+2+1)x(3+1)x(25+5+1)
=7x4x31=868 > 2 x 300.
Therefore 300 is abundant.
See you next next Sunday!
According to NCLS calendar, there is no school next week (4/12).
Please take care and stay healthy!
We are going to learn Ch.9 Base Number Arithmetic on 4/19.
