Question

甲乙兩個(gè)植樹(shù)隊(duì)同時(shí)植樹(shù)，且兩隊(duì)每植一棵樹(shù)所用的時(shí)間相等，當(dāng)甲隊(duì)植了時(shí)，乙隊(duì)才植8棵，當(dāng)乙隊(duì)植了時(shí)，甲隊(duì)已植了16棵，當(dāng)甲隊(duì)植完時(shí)，乙隊(duì)還有 ________棵沒(méi)植．

Answer 1

32
分析：通過(guò)理解題意可知本題存在兩個(gè)等量關(guān)系，即甲隊(duì)的=8棵，乙隊(duì)的=16棵，根據(jù)這兩個(gè)等量關(guān)系可列出方程組，分別求出甲、乙兩個(gè)植樹(shù)隊(duì)植樹(shù)的棵樹(shù)，從而求得結(jié)果．
解答：設(shè)甲隊(duì)植樹(shù)x棵、乙隊(duì)植樹(shù)y棵，依題意有
，
解得．
64-32=32棵．
故答案為：32．
點(diǎn)評(píng)：本題考查了二元一次方程組的應(yīng)用，利用二元一次方程組求解的應(yīng)用題一般情況下題中要給出2個(gè)等量關(guān)系，準(zhǔn)確的找到等量關(guān)系并用方程組表示出來(lái)是解題的關(guān)鍵．注意本題“兩隊(duì)每植一棵樹(shù)所用的時(shí)間相等”的引申意義．