Multiplication by 25

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	Multiplication by 50

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Use the following steps to multiply mentally by 25.

Divide the number by 4.

If the remainder is 0, write 00 after the quotient.

If the remainder is 1, write 25 after the quotient.

If the remainder is 2, write 50 after the quotient.

If the remainder is 3, write 75 after the quotient.

Example:

89 × 25 =

Divide 89 by 4.

89 ÷ 4 = 22 (remainder = 1)

Since the remainder is 1, write 25 after 22.

89 × 25 = 2225.

Example:

474 × 25 =

Divide 474 by 4.

474 ÷ 4 = 118 (remainder = 2)

Since the remainder is 2, write 50 after 118.

474 × 25 = 11850.