甲車隊(duì)有50輛汽車,乙車隊(duì)有41輛汽車,如果要使乙隊(duì)汽車數(shù)比甲隊(duì)汽車數(shù)的2倍還多1輛,應(yīng)從甲隊(duì)調(diào)多少輛到乙車隊(duì)?
分析:把調(diào)整后甲隊(duì)汽車數(shù)看作單位“1”,要使乙隊(duì)汽車數(shù)比甲隊(duì)汽車數(shù)的2倍還多1輛,也就是說(shuō)甲乙兩隊(duì)的汽車總數(shù)減去1輛后,乙隊(duì)汽車數(shù)是甲隊(duì)汽車數(shù)的2倍,所以調(diào)整后,甲車汽車的數(shù)量為(50+41-1)÷(1+2)=30(輛);因?yàn)榧总囮?duì)原有50輛汽車,所以應(yīng)從甲隊(duì)調(diào)50-30=20(輛)到乙車隊(duì).
解答:解:調(diào)整后,甲車有:
(50+41-1)÷(1+2),
=90÷3,
=30(輛);

從甲隊(duì)調(diào)到乙車隊(duì)的數(shù)量:
50-30=20(輛);
答:應(yīng)從甲隊(duì)調(diào)20輛到乙車隊(duì).
點(diǎn)評(píng):解答此題的關(guān)鍵是通過(guò)倍數(shù)關(guān)系,求出調(diào)整后,甲車隊(duì)的數(shù)量.
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