Multiplying a 2- or 3-digit number by 25

1. Select a 2- or 3-digit number. (Choose larger numbers when you feel sure about the method.)
2. Divide by 4 (or by 2 twice).
3. Add 2 zeros (or move the decimal point 2 places to the right).

   Example:

1. The 2-digit number chosen to multiply by 25 is 78.
2. Divide by 2 twice: 78/2 = 39, 39/2 = 19.5
3. Move the decimal point 2 places to the right: 1950
4. So 78 x 25 = 1950.

   See the pattern?

1. The 3-digit number chosen to multiply by 25 is 258.
2. Divide by 2 twice: 258/2 = 129, 129/2 = 64.5
3. Move the decimal point 2 places to the right: 6450
4. So 258 x 25 = 6450