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= 11/8 + 5/12 -2/10 (disamakan penyebutnya)
= 165/120 + 50/120 - 24/120
= 191 /120
b. 50/100 + 75/10 × 1/25 - 5/4
= 50/100 + 75/250 - 5/4 (disamakan penyebutnya)
= 250/500 + 150/500- 625/500
= - 225/500 (diperkecil, masing2 dibagi 25)
= - 9/20