Matrix Multiplication — The Easiest Way You’ll Ever Learn It
Let Me Teach You Like This Is Your First Time
If matrix multiplication has ever confused you, good. That means you’re about to finally understand it properly.
Forget complicated rules for a moment.
👉 Think of it like this:
You are matching a row with a column… and having a tiny conversation between numbers.
That’s it.
🧠 The Golden Rule (Never Forget This)
👉 Row × Column → Multiply → Add
I want you to hear my voice in your head saying this every time.
🎯 My Signature Memory Trick (Ashina Trick™)
✨ “Across then Down, Multiply then Sum.”
- Across (→) = Row
- Down (↓) = Column
- Multiply the pairs
- Add them together
👉 That’s your entire method.
🔢 Example 1: 2 × 2 Matrix (Start Simple, Master Fast)
Let’s take:
🪄 Watch Me Do It
First Box (Top Left)
Take row → (2, 3)
Take column ↓ (5, 7)
👉 Multiply + Add:
( 2 × 5 ) + ( 3 × 7 ) = 10 + 21 = 31
(2×5)+(3×7)=10+21=31
Next Box (Top Right)
Row → (2, 3)
Column ↓ (6, 8)
( 2 × 6 ) + ( 3 × 8 ) = 12 + 24 = 36
(2×6)+(3×8)=12+24=36
Bottom Row
( 1 × 5 ) + ( 4 × 7 ) = 33
(1×5)+(4×7)=33
( 1 × 6 ) + ( 4 × 8 ) = 38
(1×6)+(4×8)=38
✅ Final Answer
💎 Pause & Remember This
👉 Each box = one row + one column
👉 Don’t rush. Accuracy beats speed.
Example 2: 3 × 3 Matrix (You’re Leveling Up Now)
A=105216340B=721830946
✨ Let’s Do Just One Together
Top left box:
Row → (1, 2, 3)
Column ↓ (7, 2, 1)
( 1 × 7 ) + ( 2 × 2 ) + ( 3 × 1 ) = 7 + 4 + 3 = 14
(1×7)+(2×2)+(3×1) = 7+4+3 = 14
👉 Same process for everything else.
✅ Final Answer
1464714358352869
🧠 Premium Memory Tricks (Only My Students Know These 😉)
💡 1. The “Handshake Trick”
Imagine:
- Row = one person
- Column = another person
👉 Each number “shakes hands” (multiplies), then you add all handshakes.
💡 2. The “Zip Trick”
Zip the numbers together:
Example:
(2, 3) and (5, 7)
👉 Zip → (2×5), (3×7) → Add
💡 3. The “One Box Rule”
👉 Never think about the whole matrix
👉 Just solve one box at a time
This removes 90% of confusion instantly.
💡 4. My Favorite One
✨ “Same row, new column = new answer”
👉 Keep the row fixed, just change columns.
🎯 Your Turn (Practice Like a Pro)
Now I want you to try this:
201142351×132215046
🚀 Final Words From Me
Matrix multiplication is not hard.
It only feels hard when:
- you try to do everything at once
- or forget the simple rule
👉 Come back to this always:
Row × Column → Multiply → Add
And you’ll never get stuck again.
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