three sixths of the books is hers为什么要把is变成are,而且为什么用sixths,而不用sixth?

three sixths of the books is hers为什么要把is变成are,而且为什么用sixths,而不用sixth? (Three)(sixths)(of the books)(is)here.改正括号里的错误 the difference of five-sixths minus the X is a half,what is The difference of Five-sixths minus the X is a half ,what is -What's one fourth and a half,do you know?-Yes,it's___.A.two sixths B.three fourths C.one three D.three sixths请写明理由, three of the all of the three three of the students 翻译 The one of three years at.the ago of three three of four 和three of the four three of us和the three of us什么区别 the three of 和 three of 有什么区别? the three of you 区别 three of you in the top of three还是in the top three? Which is the biggest of the three?Which is the smallest of the three? Peter is the tallest of the three.Peter is the tallest of the three .有谁知道? Three q of the students are girls