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For some, adding figures is a cinch, but for others, it is more difficult. Calculators do the hard work for you, adding up, dividing, and multiplying sums in seconds. They come in handy for large tasks and can be helpful for kids when doing their math homework.

From the most inexpensive models to the most elaborate designs, there are calculators to meet every need. Choose among brands like HP, Casio, and Texas Instruments that do everything from graphing to creating spreadsheets to make your life easier.