果園里一共種360棵桃樹(shù)和杏樹(shù),其中桃樹(shù)的棵數(shù)是杏樹(shù)的3倍,兩種樹(shù)各種了多少棵?
分析:由桃樹(shù)的棵數(shù)是杏樹(shù)的3倍,把杏樹(shù)的棵樹(shù)看作1倍的數(shù),桃樹(shù)的棵數(shù)就是3倍的數(shù),一共是4倍的數(shù),正好是360棵,用除法求出1倍的數(shù),即杏樹(shù)的棵數(shù),再用杏樹(shù)的棵數(shù)乘3就是桃樹(shù)的棵數(shù).
解答:解:杏樹(shù)的棵數(shù):360÷(3+1)=90(棵),
桃樹(shù)的棵數(shù):90×3=270(棵),
答:兩種樹(shù)各種了270棵、90棵.
點(diǎn)評(píng):解答此類(lèi)題的關(guān)鍵是:根據(jù)題意先求出1倍的量.
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