
MATEMATIKA ( PERKALIAN )
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•
Mathematics
•
3rd Grade
•
Hard
Moch firdaus
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1
MATEMATIKA ( PERKALIAN )
by Lia Indra Suhartuti, S.Pd
2
Operasi Perkalian
a. Mengalikan bilangan kelipatan 10 dengan bilangan satu angka.
contoh:
3 x 10 = 10 + 10 + 10 = 30
7 x 10 = 10 + 10 + 10 + 10 + 10 + 10 + 10 = 70
10 x 2 = 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 = 20
b. Mengalihkan dua bilangan satu angka dan bilangan dua angka kelipatan 10 dengan bilangan satu angka
3
lanjutan:
Contohnya
1). Dua bilangan satu angka
4 x 4 = 16
5 x 6 = 30
7 x 9 = 63
2). Bilangan dua angka kelipatan 10 dengan bilangan satu angka
8 x 10 = 80
20 x 4 = 80
7 x 30 = 210
4
lanjutan:
c. Mengalihkan tiga bilangan satu angka dan bilangan tiga angka dengan bilangan satu angka
contoh
1). 5 x 6 x 7 = . . . .
caranya : 5 x 6 x 7 = ( 5 x 6 ) x 7
5
lanjutan:
c. Mengalihkan tiga bilangan satu angka dan bilangan tiga angka dengan bilangan satu angka
contoh
1). 5 x 6 x 7 = . . . .
caranya : 5 x 6 x 7 = ( 5 x 6 ) x 7
= 30 x 7
= 210
Jadi, hasilnya 210.
6
lanjutan;
2). 5 x 123 = . . . .
caranya: 5 x 123 = 5 x 3 = 15
5 x 20 = 100
5 x 100 = 500 +
615
Jadi, hasilnya 615
7
​
d. Mengalikan bilangan dengan cara bersusun
contoh
1) cara bersusun panjang
124
3 x
12
60
300 +
372
8
lanjutan:
2). Cara bersusun pendek
124
3 x
372
MATEMATIKA ( PERKALIAN )
by Lia Indra Suhartuti, S.Pd
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