Sagot :
Cevap:
1)35 2)6/10
Adım adım açıklama:
12/20yi 4 ile daraltırsak 3/5 olur
3/5i de 7 ile genişletirsek 21/35 olur
.
9/15i 3 ile daraltırsak 3/5 olur
3/5i de 2 ile genişletirsek 6/10 olur.
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