Tolong jawab pakai cara

31.
3/2 + 11/4 = 6/4 + 11/4 = 17/4
17/4- 35/10 = 425/100-350/100 = 75/100 = 3/4kg

32.
3 : 4.800.000
1 : 1.600.000

33.
bunga/jam = 2×2 = 4 bunga
bunga/hari = 4×8 = 32 bunga
bunga selama 6 hari = 32 × 6 = 192 bunga
dalam lusin = 192:12 = 16 lusin bunga

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maaf kalau salah