2 3per4 + 3 1per2 - 1 2per3 =

2 3/4 + 3 1/2 - 1 2/3
11/4 + 7/2 - 5/3
2,75 + 3,5 - 1,6 = 4,65

Please, let me answer your question :)
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Mapel : Matematika
Tentang : Pecahan
Pembahasan :

[tex]2 \frac{3}{4} = \frac{11}{4} [/tex]

[tex]3 \frac{1}{2} = \frac{7}{2} [/tex]

[tex]1 \frac{2}{3} = \frac{5}{3} [/tex]

[tex] \frac{11}{4} + \frac{7}{2} = \frac{11 + 14}{4} = \frac{25}{4} [/tex]

[tex] \frac{25}{4} - \frac{5}{3} = \frac{25 \times 3 - 5 \times 4}{4 \times 3} = \frac{75 - 20}{12} [/tex]

[tex] \frac{75 - 20}{12} = \frac{55}{12} = 4 \frac{7}{12} [/tex]

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Heil Manstein!