1.
Count backwards by 4s: 24, 20, 16, 12, ___, 4
2.
Count backwards by 6s: 42, 36, ___, 24, 18, 12
3.
Count backwards by 4s: 36, 32, ___, 24, 20, 16
4.
Count backwards by 4s: 28, ___, 20, 16, 12, 8
5.
Count backwards by 4s: 24, 20, ___, 12, 8, 4
6.
Count backwards by 4s: 24, 20, 16, ___, 8, 4
7.
Count backwards by 4s: 24, ___, 16, 12, 8, 4
8.
Count backwards by 5s: 35, 30, ___, 20, 15, 10
9.
Count backwards by 4s: 28, 24, 20, 16, ___, 8
10.
Count backwards by 5s: 40, 35, 30, 25, ___, 15
11.
Count backwards by 4s: 24, 20, 16, ___, 8, 4
12.
Count backwards by 4s: 36, 32, 28, ___, 20, 16
13.
Count backwards by 5s: 25, ___, 15, 10, 5, 0
14.
Count backwards by 6s: 36, 30, 24, 18, ___, 6
15.
Count backwards by 5s: 25, ___, 15, 10, 5, 0
16.
Count backwards by 4s: 32, ___, 24, 20, 16, 12
17.
Count backwards by 6s: 36, 30, 24, ___, 12, 6
18.
Count backwards by 5s: 45, 40, 35, ___, 25, 20
19.
Count backwards by 4s: 24, 20, 16, ___, 8, 4
20.
Count backwards by 4s: 20, 16, ___, 8, 4, 0