Ziyi: mama, number 9 is a very amazing number. Lots things we can with it and lots tricks can do by using 9.......
*he continue until actually I don't really able to follow as well.
Zihan: mama, 哥哥讲的东西都是很hard hard 醬的wor.
(Mama, things that gor gor tell seems all very hard)
Mama nod her head to agree.
Zihan: 有时很像是讲nonsense 醬wor?
(Sometimes it sounds like taking nonsense right? )
Mama can't hold her laugh anymore .....
I am not sure if any similar equations out there. But this is really new to me and I never thought before. I will call this is Zi Yi's invention! or Zi Yi's Math Theory. This is what he told me..... ziyi: Mama, I wish I can write my formula too..... Me: write la... X Days... over.... ziyi: mama, I found that we can do this. (1 + 2 )* 3 - 4 / 5 = 1. Interesting right? Me: Yupe, very interesting. But I think it will be better if you have a equation with 1,2,3,4,5,6 like that. ziyi: Then 1+2, *3, -4, /5, +6 =7 lo (((((1+2)*3)-4)/5)+6)=7 Me: Wow... 你之前已经有想过了对吗？ ziyi: No, I just do base on your question. Me: ziyi, this is call requirements ( 职业病） ziyi: mama, there are short cut to do multiplication 9, and other numbers. I wonder if I also can come out some short cut or tricks. In order to count like a clock for multiplication 5 I think we can come out a formula. And I finally found one. Me: Really? ziyi: Give me a number. Just any number Me: 250 ziyi: 250 * 5 it will be 250 divided by 2 times 10. So, 250/2 *10 = 125 * 10 = 1250 ziyi: give me another number Me: 24? ziyi: still the same, 24 / 2 * 10 = 120 Me: wow....!!! ziyi: you know why? This is because 10 / 2 = 5! ziyi: Ehhh... maybe we can try divided by 5. Let's try times 2 divided by 10 ziyi: Give me any number Me: 250 ziyi: If divided by 5 then the short cut is divided by 2 and times 10. So, 250 * 2 / 10 = 500 / 10 = 50. ziyi: wow... it works! conclusion: multiplication 5, tricks is divided by 2 times 10 division 5, tricks is times 2 divided by 10 Seriously .... ziyi you are too amazing!
He very bz with his number again. I don't know what he will going to do with it.