Multiplying by 12: The Twelve Times Table Strategy
Advanced
Break down the twelve times table into easier steps. This stack teaches the facts from 12 x 1 to 12 x 12 and introduces the strategy of splitting 12 into (10 + 2).
Multiplying by 12: The Twelve Times Table Strategy
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What is a helpful strategy for multiplying a number by \(12\)?
Break the \(12\) into a \(10\) and a \(2\). Multiply the number by \(10\), then multiply it by \(2\), and add the two results together. For example, \(12 \times 3 = (10 \times 3) + (2 \times 3) = 30 + 6 = 36\).
Use the \((10 + 2)\) strategy to find \(12 \times 5\).
1. Multiply by 10: \(10 \times 5 = 50\).
2. Multiply by 2: \(2 \times 5 = 10\).
3. Add them together: \(50 + 10 = 60\).
So, \(12 \times 5 = 60\).
