0.5‰ * 371
= ( 0.5 * 371 )‰
= 185.5‰
= 18.55%
= 0.1855 。
0.5‰*371
=0.5*371÷1000
=185.5÷1000
=0.1855
0.5‰×371
=0.5×0.371
=0.1805
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