
bilangan
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Mathematics
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7th Grade
•
Hard
asnida nasution
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BILANGAN
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Tujuan
Mengenal Bilangan Bulat
Membandingkan Bilangan dengan menggunakan Garis Bilangan
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APA ITU BILANGAN BULAT
Semua bilangan yang terdiri atas bilangan negatif, bilangan nol dan bilangan positif
Himpunan bilangan bulat dilambangkan dengan huruf Z.
Huruf Z berasal dari kata Zahlen (bahasa Jerman) yang artinya bilangan
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Bilangan bulat meliputi :
Bilangan Bulat Negatif {-1, -2, -3, -4, ...}
Bilangan Asli { 1, 2, 3, 4, 5, ...}
Bilangan Cacah { 0, 1, 2, 4, ...}
Bilangan Ganjil { 1, 3, 5, 7, ... }
Bilangan Genap { 2, 4, 6, 8, ... }
Bilangan Prima { 2, 3, 5, 7, ...}
Bilangan Komposit {4, 6, 8, 9, ...}
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Membandingkan Bilangan Bulat
Dalam membandingkan bilangan bulat terlebih dahulu kita harus mengurutan bilangan bulat. Mengurutkan bilangan bulat berarti menuliskan bilangan bulat secara urut dari nilai terkecil ke nilai terbesar, atau sebaliknya. Berdasarkan garis bilangan, semakin ke kanan letak suatu bilangan, maka nilainya semakin besar. Sedangkan semakin ke kiri letak bilangan tersebut, maka nilainya semakin kecil.
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Membandingkan Bilangan Bulat :
Membandingkan bilangan bulat berarti menentukan nilai suatu bilangan bulat apakah lebih besar, sama dengan, atau lebih kecil dari bilangan bulat lainnya. Simbol yang digunakan dalam membandingkan bilangan bulat adalah :
Misalkan, a dan b termasuk dalam himpunan bilangan bulat, maka
- Jika a lebih besar dari b, maka a > b contoh 5 > -1
- Jika a sama dengan b, maka a = b contoh 3 = 3
- Jika a lebih kecil dari b, maka a < b Contoh -4 < 2
BILANGAN
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