2-Digit × 2-Digit
Split into tens and ones: 23×34 = 20×30 + 20×4 + 3×30 + 3×4
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Why does the column method for 2-digit × 2-digit look like that? Cut the big rectangle by tens and ones and you will see: 23×34 is really four small rectangles — 20×30, 20×4, 3×30 and 3×4 — and their areas add up to the answer. The two rows of the column method are exactly the right pair and the left pair of blocks.
Cut 23×34 into four blocks by tens and ones. Tap Next to light up each partial product and add them, while the column method repeats the same steps.