10, 8, 6, ..., 2, ...
count back in TWOS...4, 0
9,...,...., 6,5
count back in ONES...8, 7
35,40, ..., ...., ....
count on in FIVES - 45, 50, 55
15,..., 13, ...., ....
count back in ONES...14, 12,11
100, ..., 80, ...., ....
count back in TENS, 90, 70, 60
1,...,3,....,5
count on in ONES ...2,3
5,10,15,...,...
count on in FIVES ...20, 25.
4,8, ..., 16, 20, ...
count on in FOURS... 12, 20
...,20, 30,..., 50
count on in TENS ...10, 40
50, ..., 30,...., .....
count back in TENS ...30, 20, 10