Estimates the sum of 2 numbers.

This calculator has 3 inputs.

This calculator has 3 inputs.

- Round numbers to the nearest 5 and then add up rounded numbers

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- estimate
- an approximate calculation or judgment of the value, number, quantity
- estimate sums
- number
- an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations and for showing order in a series or for identification. A quantity or amount.
- rounding
- replacing a number with an approximate value that has a shorter, simpler, or more explicit representation
- sum
- the total amount resulting from the addition of two or more numbers, amounts, or items