+ plus
– minus
± plus or minus
× times/multiplied by
÷ divided by
= is equal to
≠ Is not equal to
< Is less than
≤ Is less than or equal to
> Is more than
≥ Is more than or equal to
%    percent
∞   infinity
in       inch
ft       foot
yd     yard
ml     mile
mm   millimeter
cm    centimeter
km    kilometer
ha     hectare