Multiplication by 50
Use the following steps to multiply mentally by 50.
 If the remainder is 0, write 00 after the quotient.
 If the remainder is 1, write 50 after the quotient.
Example:
74 Ã— 50 =
Divide 74 by 2. 74 Ã· 2 = 37. (remainder = 0)
Since the remainder is 0, write 00 after 37.
74 Ã— 50 = 3700.
Example:
147 Ã— 50 =
Divide 147 by 2. 147 Ã· 2 = 73 (remainder = 1)
Since the remainder is 1, write 50 after 73.
147 Ã— 50 = 7350.
