Answers

2015-07-29T21:23:59+08:00
The meaning of the dot is the multiplication symbol (x)

1 5 1
the meaning of dot is (x) I have same answer with Krystal13
2015-07-30T19:53:40+08:00
the meaning of dot is x I cant explain why
0
The reason why the symbol (x) is replaced with a dot is because the x is often used as a variable in math. To avoid confusion, they just replaced the multiplication symbol instead. :D