Question

判断2^12乘以5^8的整数位数有几位?

Answer 1

(2^12)×(5^8)

=[(2^8)×(5^8)]×(2^4)

=(10^8)×(2^4)

=100 000 000×16

=1 600 000 000

所以,整数位数有10位.