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10 × 9 = 90

10 multiplied by 9 equals 90

This shows 10 columns × 9 rows = 90 circles in total

Each row has 10 circles, and there are 9 rows

10 × 9 = 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 + 10 = 90

Adding row 1 of 9...

Additional information how to quickly calculate this multiplication:

  1. By 10 method:
    Multiplying by 10 is easy - just add a zero to the number!
    9 × 10 = 90 = 90
  2. Plus method:
    If you know 10 × 8 = 80, then 10 × 9 = 80 + 10 = 90
  3. Minus method:
    If you know 10 × 10 = 100, then 10 × 9 = 100 - 10 = 90