Two bars, one longer — build it, count how many times as long, or split it back to the unit with the bar model.
Two bars share one scale and the child builds one to be N times as long as the other, counts how many times as long it is, or splits it back to the unit. The bar model makes multiplicative comparison concrete. Best for Grades 3–4.
A free, no-signup, no-ads math game for Grades 3–4 — practising multiplicative-comparison, multiplication, times-as-many, bar-model, division. Play in your browser on the KidsDoMath games hub or explore more Arithmetic games.
More like this: Rounding Estimate Sum · Decimal Duel · Estimation Station.