CALCULATION
add up (to something)
to total up to a particular amount.The bill added up to $200.These groceries will add up to almost sixty dollars.These numbers just won't add up.
all told
totaled up; including all parts.All told, he earned about $700 last week.All told, he has many fine characteristics.
round something off
to change a number to the next higher or lower whole number.You should round 8.122 off.I rounded off 8.789 to 9.
rule of thumb
a rough or an inexact guide, rather than an exact measurement, used for quick calculations. (From the use of one's thumb to make quick and rough measurements.)By rule of thumb, that table is about six feet long.I haven't measured that pole, but I guess according to rule of thumb that it's about ten feet high.
run to something
to amount to a certain amount of money.In the end, the bill ran to thousands of dollars.His account ran to more than I expected.
notch
tr. to count up something; to add up or score something.Well, it looks like we notched another victory.The crooks notched one more theft before they were caught.
number crunching
n. using a computer to solve enormously complicated or complex mathematical problems.I don't do a lot of number crunching, so I don't need a terribly fast machine.I use the big mainframe computer for number crunching.