Dividing a 2- or 3-digit number by 3 1/3

1. Select a 2- or 3-digit number.
2. Multiply by 3.
3. Move the decimal point one place to the left.

   Example:

1. The 2-digit number chosen to divide by 3 1/3 is 72.
2. Multiply by 3: 72 x 3 = 216
3. Move the decimal point one place to the left: 21.6
4. So 72 divided by 3 1/3 = 21.6.

   See the pattern?

1. The 2-digit number chosen to divide by 3 1/3 is 48.
2. Multiply by 3: 48 x 3 = 120 + 24 = 144
3. Move the decimal point one place to the left: 14.4
4. So 48 divided by 3 1/3 = 14.4.

After practicing, choose larger numbers. Insist on exact answers (you won't get an exact answer if you divide by 3.3 using a calculator). Multiply from left to right in steps and impress your friends with your mental powers.