Xiao Ming spent a total of 12.8 yuan on a math book and a Chinese book. A Chinese book is 6.48 yuan, how much is a math book?
小明买一本数学读物和一本语文读物，一共花去了12.8元．一本语文读物6.48元，一本数学读物多少钱？
<gadget id="calculator">12.8 - 6.48</gadget>
<output>6.32</output>

<result>6.32</result>