A sum calculator adds a list of numbers, providing the total, count, average, minimum, and maximum. Useful for tallying expenses, quiz scores, inventory counts, and any situation requiring quick summation of a number list.
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Pro Tip
For a quick sum of consecutive integers: sum = (first + last) × count / 2. Sum of 1 to 100: (1+100) × 100/2 = 5,050.
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Did You Know?
Carl Friedrich Gauss, aged 10, reportedly summed 1 to 100 instantly by noticing that 1+100=101, 2+99=101, and so on, making 50 pairs: 50×101=5,050. This elegant insight led to the formula n(n+1)/2.
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