
Pangkat 3 dan akar pangkat 3
Presentation
•
Mathematics
•
5th Grade
•
Practice Problem
•
Hard
Dwi Rohmawati
Used 5+ times
FREE Resource
6 Slides • 0 Questions
1
Matematika kelas 5 by DwiRohma
2
Pangkat Tiga
Pangkat tiga suatu bilangan merupakan perkalian berulang bilangan tersebut sebanyak tiga kali.
Jika p adalah sebuah bilangan, maka p pangkat 3 bisa kita tuliskan
P3 = p x p x p , dimana p3 dibaca p pangkat 3
DwiRohma
Matematika Pangkat Tiga dan Akar Pangkat Tiga
3
1. 63 = . . . . .
Penyelesaian :
63 = 6 x 6 x 6 = 216
Some text here about the topic of discussion
2. Berapa hasil dari 12 pangkat tiga ?
Penyelesaian :
123 = 12 x 12 x 12 = 1728
3. Berapa jumlah 3 bilangan kubik
pertama ?
Penyelesaian :
13 + 23 + 33= 1 + 8 + 27 = 36
4. (23 + 33) x 2 = . . . . .
Penyelesaian :
(8+27) x 2 = 35 x 2 = 70
Operasi didalam kurung dikerjakan terlebih dahulu
4
Akar pangkat tiga merupakan kebalikan dari pangkat tiga.
Akar Pangkat Tiga dilambangkan dengan " 3√ "
a3 = b, maka 3√b = a
Contoh :
3√64 dibaca "akar pangkat tiga dari 64"
karena 43 = 64, maka 3√64 = 4
Some text here about the topic of discussion
5
03 = 0
13 = 1
23 = 8
33 = 27
43 = 64
53 = 125
63 = 216
73 = 343
83 = 512
93 = 729
0
1
8
7
4
5
6
3
2
9
Hafalkan pasangan bilangan kuadrat dengan angka terakhir hasil kuadratnya.
0 pasangannya 0, 1 pasangannya 1, 2 pasangannya 8, dan seterusnya.
6
03 = 0
13 = 1
23 = 8
33 = 27
43 = 64
53 = 125
63 = 216
73 = 343
83 = 512
93 = 729
0
1
8
7
4
5
6
3
2
9
Contoh :
3√15.625 = . . . .
penyelesaian :
lihat dan beri batas 3 angka dari belakang, cari kuadrat yang mendekati angka tersebut. Diatas angka 15 jadi kuadrat yang hasilnya mendekati 15 yaitu 23
lihat angka paling belakang. Angka 5, pasangan angka 5 yaitu 5.
Jadi hasil dari 3√15.625 = 25.
Matematika kelas 5 by DwiRohma
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