Question

18．林場(chǎng)要栽種松樹(shù)苗65行，每行24棵，要栽的柏樹(shù)苗比松樹(shù)的3倍少109棵，林場(chǎng)要栽多少棵柏樹(shù)苗？

Answer 1

分析 根據(jù)題意，先每行的棵數(shù)乘以行數(shù)，求出松樹(shù)苗的棵數(shù)，再根據(jù)種的柏樹(shù)苗比松樹(shù)的3倍少109棵，可得：種的柏樹(shù)的棵數(shù)=松樹(shù)的棵數(shù)×3-109，據(jù)此代入數(shù)據(jù)即可求．

解答 解：24×65×3-109
=1560×3-109
=4680-109
=4571（棵）；
答：林場(chǎng)要栽4571棵柏樹(shù)苗．

點(diǎn)評(píng) 解答此題的關(guān)鍵是：弄清楚數(shù)量間的關(guān)系，得出等量關(guān)系式，問(wèn)題即可得解．