将下列数字表示为标准形式
(i) 5,00,00,000
(ii) 70,00,000
(iii) 3,18,65,00,000
(iv) 3,90,878
(v) 39087.8
(vi) 3908.78
已知:(i) 5,00,00,000 (ii) 70,00,000 (iii) 3,18,65,00,000
(iv) 3,90,878 (v) 39087.8 (vi) 3908.78
要求:将上述数字表示为标准形式。
解答
(i)5,00,00,000=5×10000000
=5×107
(ii)70,00,000
=7×1000000
=7×106
(iii)3,18,65,00,000
=3.1865×109
(iv)3,90,878
=3.90878×105
(v)39087.8
=3.90878×104
(vi)3908.78
=3.90878×1000
=3.90878×103
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