加是“plus”有时候也用“and”表示
例如：3+4=7 ”three and four is seven“
减是“minus”
例如：8-3=5 “Eight minus three is five”
乘是 times
例如：3×2=6 “three times two is six.”
除是divided
例如：6÷3=2 “six divided by three is two"