Educational worksheet teaching square numbers with multiplication exercises and mnemonic phrases.

You're working on a multiplication worksheet focused on square numbers — that is, numbers multiplied by themselves (like 3 × 3, 7 × 7, etc.). The worksheet provides helpful memory tricks for some of the harder ones.

Let’s solve each problem step by step and explain the answers using the hints where helpful.

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✔ 1. 0 × 0 = 0

> *Anything times zero is zero.*
Answer: 0

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✔ 2. 1 × 1 = 1

> *One times one is always one.*
Answer: 1

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✔ 3. 2 × 2 = 4

> *Two times two is four — super easy!*
Answer: 4

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✔ 4. 3 × 3 = 9

> *Three times three is nine — basic fact.*
Answer: 9

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✔ 5. 4 × 4 = 16

> 🎯 Memory Trick: *“2 4’s and 2 more; 8 and 8 is 16”*
> Think: 4 + 4 = 8, and 8 + 8 = 16 → So 4 × 4 = 16
Answer: 16

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✔ 6. 5 × 5 = 25

> 🎯 Memory Trick: *“5 nickels in a quarter (25 cents)”*
> Since a nickel is 5 cents, 5 nickels = 25 cents → 5 × 5 = 25
Answer: 25

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✔ 7. 6 × 6 = 36

> 🎯 Memory Trick: *“6 times 6 is 36 (it rhymes!)”*
> Just remember the rhyme: “Six times six is thirty-six.”
Answer: 36

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✔ 8. 7 × 7 = 49

> 🎯 Memory Trick: *“A week of weeks is one less than 50 days.”*
> A week has 7 days → 7 weeks = 7 × 7 = 49 → which is 1 less than 50.
Answer: 49

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✔ 9. 8 × 8 = 64

> 🎯 Memory Trick: *“I 8 and 8 till I was sick for days (64 days)”*
> Sounds like “I ate and ate till I was sick for 64 days” → 8 × 8 = 64
Answer: 64

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✔ 10. 9 × 9 = 81

> 🎯 Memory Trick: *“(remember the hands trick)”*
> One common “hands trick” for 9s: Hold up 10 fingers, put down the 9th finger → 8 fingers on left, 1 on right → 81.
> Or just memorize: 9 × 9 = 81
Answer: 81

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✔ 11. 10 × 10 = 100

> 🎯 Memory Trick: *“(add a zero on the end to multiply by 10)”*
> 10 × 10 = 10 with a zero added → 100
Answer: 100

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✔ 12. 11 × 11 = 121

> 🎯 Memory Trick: *“Add ‘eleventy’ (110) and eleven”*
> “Eleventy” is slang for 110 → 110 + 11 = 121 → so 11 × 11 = 121
Answer: 121

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✔ 13. 12 × 12 = 144

> 🎯 Memory Trick: *“1 for 4 is gross!”*
> A “gross” is 144 (12 × 12). Also, 1-4-4 sounds like “one for four” — a fun way to remember.
Answer: 144

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## ✔ Final Answers:

| Problem | Answer |
|-------------|--------|
| 0 × 0 | 0 |
| 1 × 1 | 1 |
| 2 × 2 | 4 |
| 3 × 3 | 9 |
| 4 × 4 | 16 |
| 5 × 5 | 25 |
| 6 × 6 | 36 |
| 7 × 7 | 49 |
| 8 × 8 | 64 |
| 9 × 9 | 81 |
| 10 × 10 | 100|
| 11 × 11 | 121|
| 12 × 12 | 144|

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## 💡 Bonus Tip:
These are called square numbers because they represent the area of a square with whole-number side lengths. For example:
- A 5×5 square has 25 unit squares → 5² = 25
- A 12×12 square has 144 unit squares → 12² = 144

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✔ You’ve now mastered the square numbers from 0 to 12! Great job!