已知a=0.000...025是100个0,b=0.000...04也是100个0,求a×b
问题描述:
已知a=0.000...025是100个0,b=0.000...04也是100个0,求a×b
答
a=0.000...025是100个0,即a=0.25*10(-99)
b=0.000...04也是100个0,即b=0.4*10(-99)
因此a*b=0.25*10(-99) * 0.4*10(-99)
=0.1*10(-198)