已知1.990=1.411,19.90=4.461,那么1990=_.
问题描述:
已知
=1.411,
1.990
=4.461,那么
19.90
=______.
1990
答
∵
=
1990
=
19.90×100
×
19.90
,
100
∴原式=
×
19.90
=4.461×10=44.61.
100
故答案为:44.61.