2:3=6:
9
9
=
10
10
:15.
分析:比的性質(zhì):比的前項(xiàng)和后項(xiàng)同時(shí)乘或除以相同的數(shù)(0除外),比值不變.根據(jù)比的性質(zhì)分析得解.
解答:解:2:3的前項(xiàng)由2變成6,是乘3,要使比值不變,后項(xiàng)也得乘3,即3×3=9
2:3的后項(xiàng)由3變成15,是乘5,要使比值不變,前項(xiàng)也得乘5,即2×5=10
即:2:3=6:9=10:15.
故答案為:9,10.
點(diǎn)評(píng):此題考查比的性質(zhì)的運(yùn)用.
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