
Bilangan desimal
Presentation
•
Mathematics
•
8th Grade
•
Easy
Arni Abdullah
Used 4+ times
FREE Resource
5 Slides • 11 Questions
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Bilangan Desimal
By Arni Abdullah, S.Pd., M.Pd
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Bilangan Desimal : bilangan yang punya penyebut khusus, yaitu sepuluh, seratus, seribu, dan seterusnya.
Cara Menentukan Nilai Bilangan Desimal
Contoh: 2,145
Penjelasan:
Dari bilangan desimal di atas, angka 2 adalah bilangan bulat yang menunjukkan bilangan satuan. Kemudian, angka 1 yang terletak di belakang koma menunjukkan bilangan persepuluhan yang nilainya 0,1.
Angka 4 merupakan bilangan bulat yang menunjukkan bilangan perseratusan dengan nilai 0,04. Terakhir, angka 5 menunjukkan bilangan perseribuan yang nilainya 0,005.
Dengan begitu, bilangan di atas terdiri atas, 2 satuan + 1 persepuluhan + 4 perseratusan + 5 perseribuan.
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OPERASI MATEMATIKA
Penjumlahan Bilangan Desimal
Contoh :
6, 27 + 3, 51 = 9,78
9,6 + 2,15 = 11, 75
Kuncinya : Penjumlahan dilakukan dengan disusun ke bawah kemudian tanda komanya diurutkan.
Pengurangan Bilangan Desimal
Contoh :
5,78 - 3,44 = 2, 34
6,5 - 3, 25 = 2, 25
Kuncinya : Penjumlahan dilakukan dengan disusun ke bawah kemudian ta
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OPERASI MATEMATIKA
Perkalian Bilangan Desimal
Contoh :
6, 27 x 3, 57 = 22,3839
2,6 x 12,15 = 31,59
Kuncinya : Perkalian dilakukan dengan disusun ke bawah kemudian tanda di belakang komanya dihitung.
Pembagian Bilangan Desimal
Contoh :
0,58 / 0,25 = 2,32
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Bilangan Desimal
By Arni Abdullah, S.Pd., M.Pd
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