Multiplication tables 1-12 are the foundation. Key: 6ร7=42, 7ร8=56, 8ร9=72, 9ร9=81 (commonly confused). Method to learn: sing tables, use visual arrays, practice daily. "Nines trick": 9ร6 โ hold up fingers, fold the 6th finger, count 5 to the left and 4 to the right = 54. 9รany digit: first digit = (digit-1), second digit = (10-digit). Example: 9ร7: first=6, second=3 โ 63.
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