Identify the problem type
1. Yesterday Aaron found some fossils. Today, he found 5 more fossils. In all, he found 13 fossils. How many fossils did he find yesterday?
2. Nora has 9 red pens and 6 blue pens. How many more red pens than blue pens does Nora have?
3. Peter had 10 video games. He gave some video games to Ethan. Now he has 2 video games left. How many video games did he give to Ethan?
4. There are 14 bouncy balls in the toy box. 8 of the bouncy balls are green and the rest are blue. How many of the bouncy balls are blue?
5. Clara had some joke books. For her birthday, she got 4 more joke books. Now she has 7 joke books. How many joke books did she have before her birthday?
6. Jane had some carrot sticks. She ate 2 carrot sticks. Now she has 1 carrot stick left. How many carrot sticks did she have before she ate any of them?
7. There are 10 crystal rocks in the collection, and 7 polished rocks in the collection. How many rocks are in the collection?
8. Joe had some bouncy balls. He gave 4 bouncy balls to Zach. Now he has 10 left. How many bouncy balls did Joe have to begin with?
9. What is the most important related problem type for solving JSU problems?
10. What is the most important related problem type for solving SSU problems?
11. Besides the ones in problem 9 and 10, list two different ways that a child might solve a start unknown problem.