3-1/4"等于多少厘米?
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3-1/4"等于多少厘米?
3-1/4"等于多少厘米?
3-1/4"等于多少厘米?
3是什么单位?
1"=2.54厘米,故1/4"=0.635厘米;
如果3是厘米,则答案=2.365;
如果3是",则答案6.985(3-1/4=2.75*2.54)
3-0.4就是2,6咯