When you count on or back in tens from any number, only the tens digit changes.

Example 1 => Counting on in tens from 14 goes =>
14, 24, 34, 44…

Example 2 => Counting back in tens from 95 goes =>
95, 85, 75, 65…

Example 3 => Order these numbers counting UP in 10s =>
21 41 31 11
Answer => 11, 21, 31, 41…

Example 4 => Order these numbers counting DOWN in 10s => 66 56 46 76
Answer => 76, 66, 56, 46…

Now try a few practice questions!