## UPSIDE-DOWN DIVISION: UPSIDE-DOWN DIVISION OF 81 UPSIDE-DOWN DIVISION OF 81

Upside-down division of 81 is shown below.

(81 = 34) DESCRIPTIONS

• 81 is divisible by 3. Write 3 to the left. When 81 is divided by 3 the result is 27. Write 27 under 81
• 27 is divisible by 3. Write 3 to the left. When 27 is divided by 3 the result is 9. Write 9 under 27
• 9 is divisible by 3. Write 3 to the left. When 9 is divided by 3 the result is 3. Write 3 under 9
• 3 is divisible by 3. Write 3 to the left. When 3 is divided by 3 the result is 1. Write 1 under 3 OTHER INFORMATION

• The only prime factor of 81 is 3

• Prime factorization of 81 is as following.

• Without Exponents: 81 = 3 × 3 × 3 × 3

• With Exponents:81 = 34

## INFORMATION

The solution and descriptions above are generated by the upside-down division calculator. You can use the upside-down division calculator to see the upside-down division of other numbers.

### UPSIDE-DOWN DIVISION

Upside-down division is a method used to find the prime factors and prime factorization of a number.

In this method, we draw a rectangular line and write the number on the RHS. Then we try to find a prime number that divides the number on the right. Once we find such a prime number, we write it on the left. We make the division and write the result under the number. on the RHS and continue the algorithm until we reach 1 on the RHS.

The numbers on the LHS are the prime factors. The prime factorization can be found by multiplying those prime numbers.

### OTHER FEATURES OF 81 