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Adding numerous fractions ranging from half inches to 64ths is a pain. This compact wheel calculator lets you add and subtract any number of fractions successively (64ths, 32nds, 16ths, 8ths, quarters and half inches) and the result window will show the total in fractions, decimal inches and millimetre equivalents.

It is easy to use and avoids fretting over adding a range of different fractions. Errors can be reversed as they are made or discovered, without starting from scratch. Instructions are printed on the top-wheel.

6" in diameter and 3/32" thick, it is made in Canada from durable high-density PVC and polyethylene.

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