We covered the material about Exponents. The following are the important rules and defintions to memorize:
- a^m * a^n = a^(m+n)
- a^m / a^n = a^(m-n)
- (a^n)^m = a^(nm)
- a^m * b^m = (ab)^m
- a^m / b^m = (a/b)^m
- a^0 = 1, a<> 0 (a to the power of zero is 1, as long as a is not zero)
- a^(-n) = 1 / a^n, a <> 0
With the above rules and defintions, we can simply expressions. We did several in-class exercises and the homework will be mostly about simplying expressions.
We also talked about exponents with variables, whose operation is no different, exception we use variables, like x, y, a, b, c, etc., to represent the things in the operation. Same rules and definitions apply.
For homework, it is on the workbook:
- Page 1, 1a, 1c, 1e, 1g, 2l, 2n, 2p, 2r
- Page 2, 4a, 4b, 4c, 6a, 6b, 7a, 7b, 7c
- Page 3, 8g, 8i, 9a, 9c
Since the school ran out of the Workbook today, and some students who just paid today did not get the workbook, so for today, I will scan the pages for the homework:
http://blog.newtonchineseschool.org/wangweidong/files/2012/09/HW_1_1.pdf
(fixed!) http://blog.newtonchineseschool.org/wangweidong/files/2012/09/HW_1_2.pdf
Also, some parents asked about where to get the textbook. Here is a link where you can buy:
http://www.singaporemath.com/New_Elem_Math_Textbk_2_p/nemt2.htm
The last one is about 10% cheaper compared to the singaporemath site.
