
PPT Bilangan Bulat
Presentation
•
Mathematics
•
7th Grade
•
Practice Problem
•
Hard
Anggun Sari
FREE Resource
5 Slides • 0 Questions
1
BAB 1
BILANGAN
2
1.1 Bilangan Bulat
Bilangan bulat dapat disajikan ke dalam beberapa model sebagai berikut.
1.
Model Garis
Perhatikan contoh berikut.
Karena (+) maka bergerak ke arah kanan
3 + 4 = 7
4 − 6 = −2
01234567
−1−2−3
Karena (−) maka bergerak ke arah kiri
−2 −1
012345
−3−4−5
3
3 + −5 = −2
−2 + −3 = −5
Model Mobil Bergerak
2 + 3 = 5
−2 + 3 = 1
0
12
3
4
5
−5
01
−1
−2−3
−4
−1
12
0
−2−3
−4
01
234
−1−2
2.
4
Perhatikan beberapa contoh hasil perkalian bilangan
bulat berikut.
3 × 4 = 4 + 4 + 4 = 12
3 × −4 = −4 + −4 + −4 = −12
−3 × −4 = − 3 × −4 = − −4 + −4 + −4
= 12
−3 × 4 = − 3 × 4 = − 4 + 4 + 4
= −12
Operasi Perkalian merupakan penyederhanaan operasi
penjumlahan berulang yang sama.
3 × 4 = 12
++
Kesimpulan:
+ × + = (+)
+
3 × −4 = −12
+
−
−
Kesimpulan:
+ × − = (−)
−3 × (−4) = 12
−
−
+
Kesimpulan:
− × − = (+)
−3 × 4 = −12
−
+
−
Kesimpulan:
− × + = (−)
1. Perkalian
1.3 Operasi Perkalian dan Pembagian
pada Bilangan Bulat
5
VIDEO PEMBELAJARAN:
BAB 1
BILANGAN
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