Count forward to 100 by ones (and by tens; backward from 10 as stretch)
Exercise Difficulty 5 ~3 min math.gK.f.ns.count_to_100.ex_05

Count To 50 Stretch

Prompt

Stretch challenge: Count from 1 to 50 without stopping. Notice the decade boundaries (29-30, 39-40).

M-K-F-EX-39-A Chart
Reference 100-chart with the 1-50 range highlighted in yellow background; cells 30, 40, 50 boxed in red as 'decade bound

Reference 100-chart with the 1-50 range highlighted in yellow background; cells 30, 40, 50 boxed in red as 'decade boundary' markers. Used as a self-check during the stretch count.

How it's presented
mode verbal prompt
Answer criteria
type verbatim sequence to 50
rubric
Reaches 50 in correct order with no skips. Decade transitions (29-30, 39-40, 49-50) negotiated correctly.
Hints
  1. Use the 100-chart if you need to look at the numbers.
  2. Watch the tricky boundary: 29 then THIRTY, not '20-ten' or '29-30-1'.
Misconceptions to watch
  • Restarts decade after 29 (says '29, 20, 21, ...').
  • Confuses 'twenty' and 'twelve' mid-sequence.
  • Loses place around 40s and skips to 50.