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Misal:garis bilangan
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-4 -3 -2 -2 -1 0 1 2 3 4 5 6 7
jadi pertama kan 7 (tarik garis bilangan dari 0 ke 7 {kanan}),trus dikurang 10 (tarik garis bilangannya dari angka 7 ke -3 {kiri})