Unit Week Countdown to
6 2 Subtract!
8 9 10 6 7 8 9 10 11 12 13 6 14 7 15 8 9 10 11 12
9 - 1 = 9 - 2 =
7 8 8 9 9 10 11 12 13 6 14 7 15 8 9 10 11 12 13 14 15
10
13 - 1 = 13 - 3 =
8 9 10 11 12 13 6 14 7 15 8 9 10 11 12 13 14 15
14 - 1 = 14 - 2 =
8 9 10 11 12 13 14 15
131