+
plus
加號；正號
例子：
“2+1”讀作：two plus one
－
minus ['ma?n?s]; negative ['neg?t?v]
減號；負(fù)號
例子：
“4-1”讀作：four minus one
“-2”讀作: minus two或 negative two
“4-(-2)”讀作：fore minus negative two
×
times 或者multiply
乘號
例子：
“2×3” 讀作： two times three
或 two multiplies three
÷
divided by
除號
例子：
“4÷2”讀作：four divided by two
=
equals; is equal to
等于號
例子：
“1+1=2”讀作：One plus one equals two.
或 One plus one is equal to two.
<
is less than
小于號
例子：
“1<2”讀作 One is less than two.
>
is greater than 或者 is bigger than
大于號
例子：
“3>1”讀作：Three is greater than one.
或 Three is bigger than one.
%
percent
百分之……
例子：
“20%”讀作：twenty percent
