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1/2" + 1/2"

Adding two fractions of an inch, exactly — the everyday jobsite arithmetic that a decimal calculator gets wrong. Reduced, carried, and shown in millimetres.

1/2" + 1/2" =
=1"
Sum
1"
Decimal inch
1"
Millimetres
25.4 mm
1/2" − 1/2"
0"
The work

Over a common denominator

Put both over 2: 1/2 = 1/2 and 1/2 = 1/2. Add the tops: 1/2 + 1/2 = 2/2. Reduced, that's 1" (1 inches). TapeMath tracks it as an exact fraction, so it lands dead on the tape mark.
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1/2" to decimal 1/2" to decimal All fraction sums Add it on the calculator
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