2tam lı kesir ile 1tamlı kesti toplarız ama önce payda eşitlemek gerekir 1 tamlı sayının paydasını 2ile genişletip 2tamlı yeni sayı bulunur payda olduğu gibi yazılı
Undeline the correct choice 1. Smoking can cause / can be caused chronic respiratory diseases. 2. Drastic measures must take / must be taken if we are to save the planet. 3. The tourists should be warned / should warn by travel agents about the dangers of crime in holiday resorts. 4. The cause of the accident must discover / must be discovered as soon as possible. 5. Stamps should be stored / should store away from light, heat and moisture or they will be damaged. 6. I don't have to type / to be typed the whole letter again as the boss has already signed it.