Mod 10 Problems. extra explanation here
Practice: Do all of these calculations mod 10:
1. 8+7=
2. 3+9=
3. 6+7=
4. 3x6=
5. 4x8=
6. 7x9=
7. 2 - 8=
8. 4 - 6=
9. 5 - 8=
10. 6 + (3x8) + 9=
11. 4x3 + 6 + 7x3=
12. 4 - (3x9)=
13. 2 - (7x4)=
14. 0 - (4x8)=
Regular Polygons practice (explanation here)
15. Find the measure of an interior angle of a regular octagon (8-gon)
16. Find the measure of an interior angle of a regular heptagon (7-gon)
17. Find the measure of an interior angle of a regular dodecagon (12-gon)