Copy the following problems. Solve. Then use the number line above to check your work.
1. 11 - (-4)
2. 0 - (-8)
3. 7 - (-6)
4. -9 - (-15)
5. -12 - (-15)
Now create 5 integer addition problems of your own. Exchange your problems with a partner.
Investigate subtracting different integers and develop a rule for predicting the sign of the difference.
R Valcin, Created with GeoGebra