3G - Mixed operations word problems

Megan has 19 seashells. How many more seashells does she need to find to have 25 seashells in her collection?

Brad has 17 balloons. 8 balloons are red and the rest are green. How many green balloons does Brad have?

There are 38 books on the shelf. Marta put 10 more books on the shelf and her mom put 4 more books on the shelf. How many books are on the shelf now?

A bee has 6 legs. How many legs do 8 bees have?

Mrs. Hilt bought an ice cream cone for 99 cents. How much would 2 ice cream cones cost?

Mrs. Hilt had 38 marbles. She lost 15 of them. How many marbles does she have left?

I have 28 pennies in my left pocket. In my right pocket I have 6 pennies. How many pennies do I have?

I have 3 rocks in my left pocket. In my right pocket I have 2 rocks. How many rocks do I have?

I have 3 hundreds, 8 tens, and 3 ones. What number am I?