1．If the degree measures of the angles of a triangle are in the ratio 3：3：4，what is the degree measure of the largest angle of the triangle？（　?。?br />如果一個三角形的角的度數(shù)之比是3：3：4，那么這個三角形的最大角的度數(shù)是多少？（　?。?/div>

2．There are four more girls than boys in Ms.Raub's class of 28 students.What is the ratio of the number of girls to the number of boys in her class？（　?。?br />在Raub老師的班級中，共有28名學生，其中女生比男生多4人。她班級中女生和男生的比例是多少？（　?。?/div>

3．被減數(shù)、減數(shù)、差的和為96，差與減數(shù)的比為1：3，減數(shù)是 ，差是 。