夕陽(yáng)紅老年秧歌隊(duì)有男隊(duì)員15人,女隊(duì)員30人,男隊(duì)員與女隊(duì)員人數(shù)的比是
15:30,
15:30,
,比值是
1
2
1
2
;女隊(duì)員與男隊(duì)員人數(shù)的比是
30:15
30:15
,比值是
2
2
分析:根據(jù)比的意義和求比值的方法進(jìn)行解答即可.
解答:解:夕陽(yáng)紅老年秧歌隊(duì)有男隊(duì)員15人,女隊(duì)員30人,男隊(duì)員與女隊(duì)員人數(shù)的比是15:30,比值是
1
2
;女隊(duì)員與男隊(duì)員人數(shù)的比是30:15,比值是2;
故答案為:15:30,
1
2
;30:15,2.
點(diǎn)評(píng):此題考查了比的意義,可以用賦值法進(jìn)行解答.
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夕陽(yáng)紅老年秧歌隊(duì)有男隊(duì)員15人,女隊(duì)員30人,男隊(duì)員與女隊(duì)員人數(shù)的比是________,比值是________;女隊(duì)員與男隊(duì)員人數(shù)的比是________,比值是________.

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