SG 6, CASC.
CFS2:  Use addition, subtraction, multiplication, and division to solve one- and two-step problems taken from story situations and contexts familiar to students.

Materials:  pencils, paper

Activity:  have students work in pairs to solve story problems

Answers to Math Challenges:

1. $100
2. added cost of named slaves, subtraced total from $500
3. $180
4. Sandra, Sam, Sue, Jeb, Joe
5. 20
6. 29
7. 40 minutes (2 miles wide; 30 minutes to cross a plantation)