dot, full stop, period

additional, gain, increase, more, supplement

calculate, calculation, count up, statistics, total

amount, in all, in total, sum, total, total amount

equation, level

parentheses

calculate, electronic calculator

calculate, calculation, tally, total up

account, accounting, calculate, calculation, figure out, score, statistics, tally, total up, work out

column, pillar

deduction, subtraction, take away, take from, take out

deduction, subtraction, take away, take from, take out

less, reduction

division

division

apportion, cut, slice

twice

comparable, equivalent, even-handed, evenly matched, level, match, same

comparable, equivalent, equality, even-handed, evenly matched, level, match, same

equation

half-time, halve, in half

halve, quarter

arithmetic, mathematics

mathematics

negative, subtract, subtraction