- Pre-Christmas: Part 6 -

While doing spring cleaning, found this...

加减口决
前面空空，加变减，减变加，
中间空空，大减小。

除的口决
前面空空，先乘商数，后加余数，
中间空空，先减余数， 后除商数。

昆合运算口决
前面空格，先搬中间/后面，
中间空格，先搬后面，
后面空格，先解决前面和中间。

单位变换口决
乘往右跳， 大变小是乘
除往左跳，小变大是除。

钱币
盈利 = 售价 - 成本
售价 = 成本 + 盈利
亏损 = 成本 - 售价

时间口诀
开始 = 结束 - 相隔
结束 = 开始 + 相隔
相隔 = 结束 - 开始

小数点口诀
加， 减， 除， 小数点要对齐，
乘要算小数点后面的为数。

分数口诀
头一样大， 脚小是老大，
脚一样大，头大是老大，
加，减 要换同分母，
乘， 上x上； 下x下
除， 先变乘， 然后分子和定分母倒转。

It was nostalgic to realize that this is the formula that get me from nothing to something in Mathematics. Thanks to Mr Lim (林）, though I can't recall his last two Chinese name, he has been great in teaching this subjects. Physically, it was lots of pain on my hand after I got "rotan" for scoring 20/40 for objective questions that time. Guess what? Not only 1 "rotan" but 20 times because I got 20 questions mistakes.

From then on, it was a hell lots of pain. Mentally, all of our class are always prepared whenever Mr Lim came in to the class. No one dare to speak nor talk to each other even though my friend is sitting just beside me. The method of learning was drastically intensive and to top that, the students in our class all score A in our Primary 6 Examination.

*Sniff*Sniff*... that was history...

My flu just got started... I'm gonna have a rest for now...

- ianization -