(1). 7 per 12 , ditambah 11 per 12 , dikurang 1 per 4 =

[tex] \frac{7 + 11 - 3}{12} = \frac{15}{12} = \frac{5}{4} [/tex]

Pembahasan :
[tex] \frac{7}{12} + \frac{11}{12} - \frac{1}{4} \\ = \frac{7 + 11 - 3}{12} \\ = \frac{15}{12} = 1 \frac{3}{12} = 1 \frac{1}{4} [/tex]

Good Luck ^^