Why calculate like a student when you can calculate like a calculator? Here are 8 proven tricks to multiply numbers instantly.
1. Magic of 11 (Any Number × 11)
Rule: "Write corners, Add neighbors"
Example: 24 × 11
1. Ends: 2 _ 4
2. Sum (2+4=6) in middle → 264
2. Unit Sum 10 & Same Tens
Example: 43 × 47 (3+7=10, 4 is same). Fastest trick ever.
Example: 72 × 78
1. Units: 2 × 8 = 16 (End part)
2. Tens: 7 × (Next No. 8) = 56
👉 Answer: 5616
3. Multiply by 5, 25, 50
Use Division instead of Multiplication.
× 5: Half & add 0. (48×5 = 240)
× 25: Divide by 4 & add 00. (36×25 = 900)
× 50: Half & add 00. (48×50 = 2400)
× 25: Divide by 4 & add 00. (36×25 = 900)
× 50: Half & add 00. (48×50 = 2400)
4. Base 100 (Near 100)
Example: 96 × 93
1. Diff: (-4) and (-7).
2. Subtract Cross: 96-7 = 89.
3. Multiply Diff: 4×7 = 28. → 8928
5. Universal Trick (2 Digit × 2 Digit)
Use "I-X-I" method (Straight, Cross, Straight).
Example: 21 × 32
1. Right (I): 1×2 = 2
2. Cross (X): (2×2)+(1×3) = 7
3. Left (I): 2×3 = 6 → 672
6. Magic of 9s (× 99, 999)
Useful for calculating prices or discounts.
Example: 43 × 99
1. Subtract 1 from number: 43 - 1 = 42 (First Part)
2. Subtract result from 99: 99 - 42 = 57 (Second Part)
👉 Answer: 4257
7. Split & Merge (Most Practical)
Break the difficult number into smaller parts (10, 20, 5, etc).
Example: 24 × 13
1. Think of 13 as (10 + 3).
2. 24 × 10 = 240
3. 24 × 3 = 72
4. Add mentally: 240 + 72 = 312
8. Double & Half Method
Best for numbers ending in .5 or 5. Double one side, Half the other.
Example: 16 × 3.5
1. Double 3.5 → 7
2. Half 16 → 8
3. Calculate: 8 × 7 = 56 (Easy!)