Question

2．松樹(shù)棵數(shù)的$\frac{2}{5}$等于楊樹(shù)棵數(shù)的$\frac{3}{4}$．松樹(shù)棵數(shù)與楊樹(shù)棵數(shù)的比是15：8．

Answer 1

分析 由題意可得：松樹(shù)棵數(shù)×$\frac{2}{5}$=楊樹(shù)棵數(shù)×$\frac{3}{4}$，逆運(yùn)用比例的基本性質(zhì)，求出兩種樹(shù)的棵數(shù)的比，問(wèn)題即可得解．

解答 解：松樹(shù)棵數(shù)×$\frac{2}{5}$=楊樹(shù)棵數(shù)×$\frac{3}{4}$
所以松樹(shù)棵數(shù)：楊樹(shù)棵數(shù)的=$\frac{3}{4}$：$\frac{2}{5}$=15：8．
故答案為：15：8．

點(diǎn)評(píng) 此題主要考查比例的基本性質(zhì)的靈活應(yīng)用．