## BEATCALC:  Beat the Calculator!

Back to Calculation Tips & Tricks

 From B. Lee Clay

Squaring Numbers

Multiplying Numbers

Dividing Numbers

Subtracting Numbers

Finding Percents

Calculation
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### Multiplying a repeating 3's number by 22

1. Choose a repeating 3's number (333, etc.)
2. Multiply it by 22
3. The product is:
- the first digit is 7
- the next digits are repeating 3's (two fewer than repeating 3's in the original number)
- the last two digits are 26

#### Example:

1. If the first number is 3333:
2. Multiply by 22. The product is:
- the first digit is 7: 7.
- the next digits are repeating 3's (two fewer than repeating 3's in the original number): 33.
- the last two digits are 26: 26.
3. So 3333 × 22 = 73326.

See the pattern?

1. If the first number is 33333333:
2. Multiply by 22. The product is:
- the first digit is 7: 7.
- the next digits are repeating 3's (two fewer than repeating 3's in the original number): 333333.
- the last two digits are 26: 26.
3. So 33333333 × 22 = 733333326.
Use these three steps and you will be able to give these products with ease.