Cách sử dụng
The expression 'reckon up' means to calculate or to add up a group of numbers to determine a total. For example, if you went shopping and bought items that cost different amounts, you can reckon up the total by adding up the cost of each item. You could also use this expression when dividing a bill between friends, by adding up what everyone spent to determine how much each person needs to pay. 'Reckon up' is commonly used in casual conversations or in situations where basic calculations are necessary.