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= 52/9 + 11/15 × 4/3
= 52/9 + 44/45 = 148/45 = 3 13/45
~ 3/4 × 16/9 = 4/3
~ 11/15 × 4/3 = 44/45
5. = 5/2 × 2/5 - 3/4 ÷1/4 + 8 1/2
= 1 - 3 + 17/2 = 13/2 = 6 1/2 = 6,5
~ 5/2 ×2/5 = 1
~ 3/4 ÷ 1/4 = 3
Maaf kalau salah ya...