Most frogs do in fact have teeth of a sort.
They have a ridge of very small cone teeth around the upper edge of the jaw. These are called Maxillary Teeth.
Frogs often also have what are called Vomerine Teeth on the roof of their mouth.
They don't have anything that could be called teeth on their lower jaw, so they usually swallow their food whole. The so-called "teeth" are mainly used to hold the prey and keep it in place till they can get a good grip on it and squash their eyeballs down to swallow their meal.
Toads, however, do NOT have any teeth.
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