Review Questions from Lessons 1-4 Answers are here.

Practice identifying problem types. For each problem (1-15) decide if it is JRU, JCU, SRU, SCU, PPW-WU, PPW-PU or CDU. Explain how you know what the problem type is.

1. Seth had 4 Bionicles. When he cleaned his room, he found some more Bionicles, and then he had 7 Bionicles. How many Bionicles did he find?

2. Sandy had 8 Silly Bandz. She gave some Silly Bandz to Ellen. Now she has 6 Silly Bandz left. How many Silly Bandz did she give to Ellen?

3. There are 2 red pens in the desk, and 3 blue pens in the desk. How many pens are in the desk?

4. Mark had 12 crayons. He lost some of his crayons. Now he has 9 crayons left. How many crayons did he loose?

5. John saw 5 birds at the bird feeder in the morning. At lunch, he saw 3 more birds. How many birds did John see in all?

6. There are 12 gum balls in the drawer. 7 of the gum balls are purple and the rest are white. How many of the gum balls are white?

7. Shauna had 10 pencils. 3 of her pencils broke. How many pencils did she have left?

8. Sarah had 4 apple slices. Her mom gave her 3 more apple slices. How many apple slices does Sarah have now?

9. There are 13 children playing an instrument in the band. 5 of the children are boys. How many of the children are girls?

10. There are 3 glow in the dark toy bugs in the drawer, and 6 colored toy bugs in the drawer. How many fewer glow in the dark bugs than colored toy bugs are in the drawer?

11. David has 3 dollars. How many more dollars does he need to earn to buy a 7 dollar video game?

12. Mark had 16 Pokemon cards. He gave 7 Pokemon cards to Luke. How many Pokemon cards does Mark have left?

13. Ellen made 2 bead necklaces. How many more does she have to make to have 6 bead necklaces?

14. Gus has 7 toy cars. Ethan has 3 toy cars. How many toy cars do they have altogether?

15. Ethan has 5 toy trains. Mark has 8 toy trains. How many more toy trains does Mark have than Ethan?

Answer each of the following in complete sentences.

16. In what way are Join and Separate problems similar?

17. What makes Part-Part-Whole, whole unknown problems more difficult for some children than Join, result unknown problems?

18. How (what manipulative steps) does a child direct model to solve a Join Change Unknown problem?

19. How (what manipulative steps) does a child direct model to solve a Compare Difference Unknown problem?

20. When children direct model PPW-PU problems, which other problem type's direct modeling strategy do they usually use to solve the problem?

21. Give 2 examples of where learning vocabulary and language is important for solving the word problems discussed in this section.