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-8 = -8
2. 5 + 6 = 6 +5 ⇒ sifat komutatif dalam penjumlahan bil bul ⇔ a + b = b + a
11 = 11
3. 2×( 5 × 3) = (2× 5)×3 ⇒sifat asosiatif dlmperkalian bil bulat⇔ a×(b×c) =(a×b)×c
2× 15 = 10 × 3
30 = 30