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➡️Mata Pelajaran: Matematika➡️Bab: (-)
➡️Kata Kunci: (-)
Pembahasan
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Misal a=1, b=2, c=3
maka
1 + (2 + 3) = (1 + 2) + 3
1 + 5 = 3 + 3
6 = 6
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