The answer is: " [tex] \frac{1}{3} [/tex] " .
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[tex] \frac{1}{12} + \frac{3}{12} = \frac{(1 +3)}{12} = \frac{4}{12} [/tex] .
→ Simplify: " \frac{4}{12} [/tex] "= (4÷4) / (12÷4) = [tex] \frac{1}{3} [/tex] .
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