Hitunglah hasil pengurangan pecahan berikut: 1. 4/5-2/3 =...2. 14/15-2/3=...3. 5/7-3/11=...4.13/15-4/5=...5. 11/13-7/9=..
Matematika
asih1976
Pertanyaan
Hitunglah hasil pengurangan pecahan berikut: 1. 4/5-2/3 =...2. 14/15-2/3=...3. 5/7-3/11=...4.13/15-4/5=...5. 11/13-7/9=..
1 Jawaban
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1. Jawaban AZain
1. 4/5 - 2/3= (4*3/5*3)-(2*5/3*5)= 12/15-10/15= 2/15
2. 14/15-2/3= (14*1/15*1-2*5/3*5)14/15-10/15= 4/15
3. 5/7-3/11= (5*11/7*11-3*7/11*7)= 55/77-21/77= 34/77
4. 13/15-4/5= (13*1/15*1-4*3/5*3)= 13/15-12/15= 1/15
5. 11/13-7/9= (11*9/13*9-7*13/9*13)= 99/117-91/117= 8/117
CATATAN: caranya samakan penyebut!