分析下列每句话中分率的意义：
（1）李大伯家今年养猪头数比去年增加了
．
（2）火车速度比汽车速度快
．
（3）一杯盐水中，盐的重量是水的重量的
．
（4）三（1）班男生人数是女生人数的
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相关试题
+
= 
﹣
= 12×
÷9= 
÷3×75= 
×14=
= 
×
= 0×3= 
÷
÷
= 
= 
= 
= 12.5÷（10%÷10）=
﹣0.5= 202= 23+177%= 2.5×4=
﹣
= 3π= 
×
= 
+
= 0.6÷
= 2÷1%=350×0.02= 1﹣25%= 1+15%= 12﹣7.9=
×
= 
﹣
= （
﹣）×24= 16×
=
131131÷131= 
×
×0= 1÷
﹣÷1= 12.5×0.08=
0.9+99×0.9= 7.8×0.25×4= 
﹣
+
= 0.52×100=
×8+8×
= 
×21×
= 98﹣0.23﹣0.77= 
+÷=
44÷
= 9300÷5÷6= 0÷
= 1997+1998+1999+6=
÷9= 
×
÷
﹣4 
= 
= 
×2÷
= 
= 
= 
= 
= 
= 
= 
= 
= 
= 
= 
= 
= 
= 
= 
= 
= ．
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