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English definition of “sum”

sum

noun [C]     /sʌm/
MONEY B1 an amount of money : a large / small sum of money General words for amounts of moneyLarge amounts of moneySmall amounts of money
MATHS UK a simple mathematical calculation such as adding two numbers together: Kids these days can't do sums without a calculator .Calculations and calculatingAddition, subtraction, multiplication and division
TOTAL the total amount that you get when you add two or more numbers together: The sum of six and seven is thirteen. → See also lump sumCalculations and calculatingAddition, subtraction, multiplication and division
(Definition of sum noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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