There were some frogs sitting on a log. Then 3 more frogs sat on the log. Now there are 8 frogs on the log. How many frogs were sitting on the log first?

I have 13 fish and 3 puppies. How many pets do I have in all?

My mom baked 12 cookies. I ate some of them. Now there are 5 cookies. How many cookies did I eat?

I had 16 balloons. I popped 4 of them. Now how many balloons do I have?

There were 13 children at the park. 5 more children came to the park. Now how many children are at the park?

There were 7 birds in a nest. 3 birds flew away. Now how many birds are in the nest?

I bought 13 pieces of bubble gum and 4 suckers. How many pieces of candy did I buy in all?

8 birds were perched in a trees. Some flew away. Now there are 4 birds perched in the tree. How many birds flew away?

I lost 3 teeth. Then I lost some more. Now I’ve lost 7 teeth in all. How many more teeth did I lose?

I have 20 Pokémon cards. I gave some to my sister. Now I have 15 Pokémon cards. How many did I give to my sister?

I picked 6 apples and 7 oranges from the fruit trees. How many fruits did I pick in all?

I had 9 marshmallows. I roasted some of them. Now I have 3 marshmallows. How many marshmallows did I roast?

I have 12 blue crayons and 5 red crayons. How many blue and red crayons in all?