Multiplying a 2-digit number by 12 1/2

1. Select a 2-digit number .
2. Divide it by 8 (or by 2 three times).
3. Move the decimal point 2 places to the right.

   Example:

1. The 2-digit number chosen to multiply by 12 1/2
   is 28.
2. Divide by 8: 28/8 = 3.5
3. Move the decimal point 2 places to the right: 350
4. So 28 x 12 1/2 = 350.

   See the pattern?

1. If the 2-digit number chosen to multiply by 12 1/2
   is 58:
2. Divide by 8 (by 2 three times):
   58/2 = 29
   29/2 = 14.5
   14.5/2 = 7.25
3. Move the decimal point 2 places to the right: 725
4. So 58 x 12 1/2 = 725.