1. (-13) × 9 = -117
2. 12 × 13 = 156
3. 9 × (-37) = -333
4. (-15) × (-8) = 120
5. -28 ÷ 12 = (-28)/12 = (-1 x 28)/12 = -7/3
6. 12 ÷ 9 = 12/9 = 4/3
7. 9 ÷ (-24) = 9/(-24) = 8/(-1 x 24) = (-3/8)
8. -18 ÷ (-27) = (-18)/(-27) = (-1 x 18)/(-1 x 27) = 2/3
Note: Problems 2, 3 and 4 have many answers. Students may write answers other than the ones given