Short Answer 
The answer outlines three steps for counting: counting forwards in hundreds by adding 100 to a starting number, counting backwards in thousands by subtracting 1000, and completing number chains by subtracting a specific amount (10 or 200) from the starting number. Examples for each method are provided to illustrate the process clearly.
Step 1: Counting Forwards in Hundreds
To count numbers forwards in hundreds, you’ll add 100 starting from a given number up to your target number. Follow these sequences:
- From 2800 to 3700: 2800, 2900, 3000, 3100, 3200, 3300, 3400, 3500, 3600, 3700
- From 23493 to 24293: 23493, 23593, 23693, 23793, 23893, 23993, 24093, 24193, 24293
Step 2: Counting Backwards in Thousands
Counting backwards involves subtracting 1000 from your starting number until you reach the specified endpoint. The sequences are as follows:
- From 31050 to 25050: 31050, 30050, 29050, 28050, 27050, 26050, 25050
- From 49980 to 42980: 49980, 48980, 47980, 46980, 45980, 44980, 43980, 42980
Step 3: Completing Number Chains
To fill in number chains, you will subtract a specific amount from your starting number. Here’s how you can do it:
- Starting from 91999 and decreasing by 10: 91989, 91979, 91969
- Starting from 24701 and decreasing by 200: 24501, 24301, 24101