落伍者 等級:8 留言|加入好友
Maths Makes Sense - How to teach it .
http://www.youtube.com/watch?v=OyEne1PjUEE
……………………………………………………
Fast Multiplication of any number - using vedic math
http://www.youtube.com/watch?v=kvLjpQ0XGao
…………………………………………………
Box Multiplication
http://www.youtube.com/watch?v=CIwxJIB43Co
…………………………………………………………
Primary Maths Multiplication 快速的數學技巧(2位乘)
Fast Math Tricks - How to multiply 2 digit numbers up to 100 - the fast way! .
……………………………………………………………