if a=12±0.1 and b=8.5±0.5, find a+b and a-b within error limits
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a = 12 ± 0.1
b = 8.5 ± 0.5
a + b = (12 + 8.5) ± (0.1 + 0.5)
= 20.5 ± 0.6
a - b = (12 - 8.5) ± (0.1 + 0.5)
= 3.5 ± 0.6
b = 8.5 ± 0.5
a + b = (12 + 8.5) ± (0.1 + 0.5)
= 20.5 ± 0.6
a - b = (12 - 8.5) ± (0.1 + 0.5)
= 3.5 ± 0.6
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