Ninja Numbers: Grid Method Mastery

Learn to partition numbers (e.g. 14 into 10 and 4) to multiply 2-digit numbers by 1-digit numbers. Essential Year 3 mental maths strategy.

Multiplication Marvels Recipe Remix

About Ninja Numbers

Ninja Numbers gamifies the "Grid Method" (or Box Method) for multiplication. Before moving to formal vertical multiplication, students must understand how to break a number apart.

The Dojo Technique (Step-by-Step)

  1. Partition: Split the 2-digit number. (e.g., $14 \times 3$ becomes $10$ and $4$).
  2. Multiply: Multiply the tens ($10 \times 3 = 30$) and the ones ($4 \times 3 = 12$).
  3. Recombine: Add the partial products together ($30 + 12 = 42$).