Counting forward involves arranging numbers in a specific sequence where each subsequent number follows the previous one directly without skipping any intermediate values.

The act of counting forward involves incrementing or adding one unit to the previous number in the sequence to arrive at the next number. For example, counting forward from 1, the sequence would be 1, 2, 3, 4, and so on.

A number line is a visual representation often used to demonstrate counting forward. It is a straight line divided into equal intervals, with each point on the line corresponding to a specific number. Counting forward moves to the right along the number line.

Counting backward involves arranging numbers in a specific sequence where each subsequent number is lower than the previous one, moving towards zero or another specified endpoint.

The act of counting backward involves decrementing or subtracting one unit from the previous number in the sequence to arrive at the next number. For example, counting backward from 10, the sequence would be 10, 9, 8, 7, and so on.

Similar to counting forward, a number line can also be used to demonstrate counting backward. In this case, moving to the left along the number line represents counting in reverse order.

  • Start at 19:
  • 17 18 19 20
  • Now count up from 19:
  • 17 18 19 → 20
  • 20 comes next.
  • Start at 20:
  • 18 19 20
  • Now count down from 20:
  • 18 19 ← 20
  • 19 comes next.
  • Start at 12:
  • 10 11 12 13 14
  • Now count down from 12:
  • 10 11 ← 12 13 14
  • 11 comes next.