How to count up from 10s
Count up from 10 by 10's 3 times.
10,20,30
46
47
Count up from 1 by 1's 3 times.
1,2,3
Count up from 30 by 10's 3 times.
30,40,50
67
68
Count up from 15 by 1's 3 times.
15,16,17
Count up from 70 by 10's 3 times.
70,80,90
98
99
Count up from 87 by 1's 3 times.
87,88,89