甲、乙、丙三瓶糖水各有30克、40克、20克，将这三瓶糖水混合后，浓度变为30%．已知甲瓶的浓度比乙瓶和丙瓶混合溶液的浓度高9%，甲瓶的浓度比乙瓶的浓度高8%．请求出丙瓶糖水的浓度．
直接写出得数：×= 6.4×= 4﹣﹣= 1÷×= 2.5×37×4= 8.1×= 0.6÷=÷0.875﹣1=
直接写出得数+== 12×（﹣）== 1÷7+= 6.4×101﹣6= 12÷3=×××…×=
直接写出得数×= 1﹣=÷=（7+）×8= 0.1÷10%=×6= a﹣a= 12×（﹣+）=
计算．+=﹣=×=÷= 1.25××8= 1.2×= 20÷=（﹣）×30=﹣÷2= 99×÷99×=
直接写出复数．×= 1÷=÷8= 7×=×12=×=﹣=+=÷= 14÷=
×
= 6.4×
﹣
= 1÷
×
= 0.6÷
=
÷0.875﹣1=
+
=
= 12×（
）=
=
= 6.4×101﹣6
= 12
×
×
×…×
=
×
= 1﹣
=
÷
=（7+
）×8=
×6= a﹣
a= 12×（
﹣
+
）=
+
=
﹣
=
×
=
÷
=
×8= 1.2×
= 20÷
=（
﹣
）×30=
﹣
÷99×
×
= 1÷
=
÷8= 7×
=
×12=
×
=
﹣
=
+
÷
= 14÷
=
粤公网安备 44130202000953号