Stage 3 of the Rapid Mathematics track: seven trials that make multiplication fast — the distributive split, doubling and halving, and the shortcuts for ×5, ×25, ×9, ×11, and squares ending in 5. Built on the place value and addition you already own. No paper.
Each trial is locked until you clear the one before it. Every level scores out of 1000 — 600 for accuracy, 400 for speed — so speed alone can't clear the bar; you have to solve most problems, and quickly. Reach 650 to unlock the next.
You can split, double-and-halve, and fire off the ×5, ×25, ×9, ×11, and square-of-5 shortcuts — multiplying in your head instead of on paper.