
BILANGAN BULAT
Presentation
•
Mathematics
•
7th Grade
•
Medium
Yohanes Oematan
Used 2+ times
FREE Resource
9 Slides • 5 Questions
1
PEMBELAJARAN MATEMATIKA KELAS 7
By Arno
BILANGAN BULAT
2
Tujuan Pembelajaran :
1. Siswa dapat mendefinisikan bilangan bulat.
2. Siswa dapat mengoperasikan penjumlahan bilangan bulat.
3. Siswa dapat mengoperasikan pengurangan bilangan bulat.
4. Siswa dapat mengoperasikan perkalian bilangan bulat.
5. Siswa dapat mengoperasikan pembagian bilangan bulat.
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1. Pengertian Bilangan Bulat
Bilangan bulat adalah bilangan yang terdiri dari bilangan cacah (0, 1, 2, 3, ...) dan negatifnya (-1, -2, -3, ...; -0 adalah sama dengan 0 sehingga tidak lagi dimasukkan secara terpisah). Bilangan bulat dituliskan tanpa komponen desimal atau pecahan.
Himpunan semua bilangan bulat dalam matematika dilambangkan dengan Z (atau {\displaystyle \mathbb {Z} }), berasal dari Zahlen (bahasa Jerman untuk "bilangan").
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2. Penjumlahan Bilangan Bulat
​
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Contoh 1:
Tanpa menggunakan bantuan garis bilangan, hitunglah penjumlahan bilangan bulat berikut ini.
a) 125 + 234
b) -58 + (-72)
c) 75 + (-90)
d) (-63) + 125
Jawab:
a) 125 + 234 = 359
b) -58 + (-72) = -(58 + 72) = -130
c) 75 + (-90) = -(90 – 75) = -15
d) (-63) + 125 = 125 – 63 = 62
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Pengurangan Bilangan Bulat
​
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Perkalian Bilangan Bulat
Contoh :
Soal – soal :
5 × 5 = 25
10 × 4 = 40
7 × 7 = 49
-2 × (-3) = 6
-15 × (-10) = 150
-6 × (-4) = 24
-8 × 2 = -16
-10 × 10 = -100
-9 × 9 = -8
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Pembagian Bilangan Bulat
​
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Multiple Choice
15 + (-4) × 5 = ...
5
-5
35
-35
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Multiple Choice
Hasil dari 3 × 2 + 24 : 6 - 3 = ...
2
7
5
10
12
Multiple Choice
Hasil dari 3 × 2 + 24 : 6 - 3 = ...
2
7
5
10
13
Multiple Choice
Hasil dari 5+[6:(−3)] adalah….
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4
3
−2
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Multiple Choice
−6×−12=...
60
−60
−72
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PEMBELAJARAN MATEMATIKA KELAS 7
By Arno
BILANGAN BULAT
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