+　 plus　加號(hào)；正號(hào)
-　 minus　減號(hào)；負(fù)號(hào)
±　plus or minus　正負(fù)號(hào)
×　is multiplied by　乘號(hào)
÷　is divided by　除號(hào)
＝　is equal to　等于號(hào)
≠　is not equal to　不等于號(hào)
≡　is equivalent to　全等于號(hào)
≌　is equal to or approximately equal to　等于或約等于號(hào)
≈　is approximately equal to　約等于號(hào)
＜　is less than　小于號(hào)
＞　is more than　大于號(hào)
≮　is not less than　不小于號(hào)
≯　is not more than　不大于號(hào)
≤　is less than or equal to　小于或等于號(hào)
≥　is more than or equal to　大于或等于號(hào)
%　 per cent　百分之...
‰　per mill　千分之...
∞　infinity　無限大號(hào)
∝　varies as　與...成比例
√　(square) root　平方根
∵　since; because　因?yàn)?br> ∴　hence　所以
∷　equals, as (proportion)　等于，成比例
∠　angle　角
⌒　semicircle　半圓
⊙　circle　圓
○　circumference　圓周
π　pi 圓周率
△　triangle　三角形
⊥　perpendicular to　垂直于
∪　union of　并，合集
∩　intersection of 交，通集
∫　the integral of ...的積分
∑　(sigma) summation of　總和
°　degree　度
′　minute　分
″　second　秒
℃　Celsius system　攝氏度