+
plus
加号；正号
例子：
“2+1”读作：two plus one
－
minus ['maɪnəs]; negative ['negətɪv]
减号；负号
例子：
“4-1”读作：four minus one
“-2”读作: minus two或 negative two
“4-(-2)”读作：fore minus negative two
×
times 或者multiply
乘号
例子：
“2×3” 读作： two times three
或 two multiplies three
÷
divided by
除号
例子：
“4÷2”读作：four divided by two
=
equals; is equal to
等于号
例子：
“1+1=2”读作：One plus one equals two.
或 One plus one is equal to two.
<
is less than
小于号
例子：
“1<2”读作 One is less than two.
>
is greater than 或者 is bigger than
大于号
例子：
“3>1”读作：Three is greater than one.
或 Three is bigger than one.
%
percent
百分之……
例子：
“20%”读作：twenty percent