Exploring Multiplication: Using Russian Peasant Multiplication
Objective: To explore multiplication using doubling and halving skills
Materials Required: Paper and pencils
Steps: To solve: 28 × 34
- One student draws column A and other student draws column B. We can call column A ‘half’ and column B ‘doubles’.
- Each student then writes the factors as shown. The number in column A is halved and the one in column B is doubled repeatedly. When you have to half an odd number, ignore the remainder. Both students stop when 1 is reached in column A. Cancel all the even number from column A and its pair in column B.
- Next, add the numbers that are not cancelled from column B only. That gives the product.
Let us take another example to solve: 12 × 28