Pilot a probe along the number line: glide it to an exact value, and round numbers by parking on the nearest ten or hundred — the line shows which landmark is closer.
A probe slides along the number line and must land on an exact position, or — in rounding challenges — park at whichever ten or hundred is closer, with the line making the distance visible. This builds number sense, number-line fluency, rounding to the nearest ten or hundred, and a feel for place value. A good match for Grades 2–4, or any child who rounds by rule rather than by understanding.
A free, no-signup, no-ads math game for Grades 2–4 — practising number-sense, number-line, rounding, place-value. Play in your browser on the KidsDoMath games hub or explore more Arithmetic games.
More like this: Place Value Forge · Column Crunch · Galaxy Dividers.