What does 5 X 25 X 25 X 25 X25 =?

Answer 1

(5)(25⁴) = 1953125

Answer 2

I would typically recommend approaching this as 5⁹ is a calculator, but if that is not an option we can use our old friend from algebraic proofs The Associative Property of Multiplication. This allows use to rewrite this question as (25*25)*(25*25)*5 or 25²*25²*5.

25²*25²*5 (25² = 625)

(625*625)*5

625

x 625

3125

12500

375000

390625

3900625*5 (here we use our trick for 5 to half and add a 0 to the end)

1950312.5*10= 19503125