matematika
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Mathematics
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5th Grade
•
Hard
Poniman Spd
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matematika
By Poniman Spd
pecahan
2
Penjumlahan dan Pengurangan Pecahan
Penjumlahan pecahan
Penjumlahan pecahan dapat dilakukan jika penyebutnya sama. Ubah pecahan menjadi pecahan lain senilai sehingga penyebutnya sama.
Contoh:
2/3 + 1/4 = ...
Langkah penyelesaian
1. Mencari KPK dari 3 dan 4
Kelipatan 3 yaitu 3, 6, 9, 12, 15, 18, 21, 24,...
Kelipatan 4 yaitu 4. 8, 12, 16, 20, 24, ...
Jadi KPK dari 2 dan 4 adalah 12
By Poniman Spd
3
2/3 + 1/4 =...
= 8/12 (12 : 3 X 2 = 8) + 3/12 (12 : 4 X 1 = 3)
= 11/12
1. 2/5 + 1/4 = ...
Pembahasan:
2/5+1/4 = 8/20 + 5/20
= 13/20
2. 2/3 + 1/5 =....
By Poniman Spd
4
Pembahasan:
3/5 + 1/3 =
KPK 5 : 5, 15, 20, 25 dst
KPK 3 : 3, 9, 12, 15, dst
Jadi KPK nya 5 dan 3 = 15
By Poniman Spd
5
By Poniman Spd
Pecahan Senilai
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By Poniman Spd
Pecahan Senilai
matematika
By Poniman Spd
pecahan
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