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Everyday life calculators

256 calculators in 11 groups. Each one shows its formula, a worked example and its sources.

Books and reading 7

Clothing and sewing 28

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Dates and time 68

Home costs 20

Home economics 18

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Leisure and fun 27

Office, school, and productivity 22

Other 9

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Personal hygiene 9

Transportation 42

Work hours 6

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