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English definition of “get/have your sums right/wrong”

get/have your sums right/wrong

mainly UK
to calculate the cost of something correctly/wrongly: I must confess that I got my sums wrong - the house extension is costing a lot more than I expected.Calculations and calculatingAddition, subtraction, multiplication and division
(Definition of get/have your sums right/wrong from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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Translations of “get/have your sums right/wrong”

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