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INTERMEDIATEVedic Math
Multiply Numbers Close Together
Multiply two numbers that are close to each other using base method
CATSSC
For numbers near a base (10, 50, 100, etc.)
Formula
For A, B near base: (A+d_B) × base + (d_A × d_B)How It Works
0
Find differences from the base
1
Cross-add: One number + other's difference
2
Multiply the differences for right part
Examples
📝 13 × 12 (base 10): 13+2=15 or 12+3=15 → 15×10 + 3×2 = 150+6 = 156
📝 98 × 97 (base 100): 98-3=95 → 95×100 + 2×3 = 9500+6 = 9506
Pro Tips
💡 Choose the base that makes differences smallest
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