
MTK 2
Presentation
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
JUNAEDI JUNAEDI
Used 2+ times
FREE Resource
10 Slides • 0 Questions
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1
Bilangan
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2
Bilangan dan Operasinya
Bilangan dapat dikelompokkan menjadi:
• Bilangan asli: {1, 2, 3, 4, 5, . . .}
• Bilangan cacah: {0, 1, 2, 3, 4, 5, . . .}
• Bilangan bulat: {. . . ,−3,−2,−1, 0, 1, 2, 3, . . .}
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3
Bilangan dan Operasinya
Sifat-sifat operasi hitung:
1. Komutatif
Penjumlahan dan perkalian bersifat komutatif
sedangkan pengurangan dan pembagian tidak.
a + b = b + a
a × b = b × a
4
4
Bilangan dan Operasinya
Sifat-sifat operasi hitung:
1. Komutatif
Penjumlahan dan perkalian bersifat komutatif
sedangkan pengurangan dan pembagian tidak.
8 + 10 = 10 + 8
9 × 3 = 3 × 9
5
5
Bilangan dan Operasinya
2. Asosiatif
Penjumlahan dan perkalian bersifat asosiatif
sedangkan pengurangan dan pembagian tidak.
(a + b) + c = a + (b + c)
(a × b) × c = a × (b × c)
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Bilangan dan Operasinya
2. Asosiatif
Penjumlahan dan perkalian bersifat asosiatif
sedangkan pengurangan dan pembagian tidak.
(2 + 3) + 5 = 2 + (3 + 5)
(3 × 4) × 5 = 3 × (4 × 5)
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7
Bilangan dan Operasinya
3. Distributif
Perkalian bersifat distributif terhadap
penjumlahan.
a × (b + c) = (a × b) + (a × c)
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Bilangan dan Operasinya
3. Distributif
Perkalian bersifat distributif terhadap
penjumlahan.
3 × (4 + 5) = (3 × 4) + (3 × 5)
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Bilangan dan Operasinya
Perkalian bilangan bulat dengan bilangan bulat.
bilangan ganjil × bilangan ganjil = bilangan ganjil
bilangan ganjil × bilangan genap = bilangan genap
bilangan genap × bilangan genap = bilangan genap
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10
Bilangan dan Operasinya
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Bilangan
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