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2. 3 2/5 + 5/6 - 7/15 = 17/5 + 5/6 - 7/15 = 102/30 + 25/30 - 14/30 = 113/30 = 3 23/30
3. 5 - 2 7/8 = 5/1 - 23/8 = 40/8 - 23/8 = 17/8 = 2 1/8
kalau nggak salah itu
2.3 2/5+5/6=3 12/30+25/30=3 37/30=4 7/30-7/15=4 7/30-14/30=3 37/30-14/30=3 23/30
3.5-2 7/8= 5/1-23/8=40/8-23/8=17/8=2 1/8