练习册

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  • 试题
    解:(1)去超市购买所需费用 即··········································································································· 1分 去超市购买所需费用 即········································································································· 2分 当时.即 当时.即 当时.即 ·························································································································· 4分 综上所述:当时.去超市购买更合算,当时.去超市或超市购买一样,当时.去超市购买更合算．···················································································································· 5分 (2)当时.即购买10副球拍应配120个乒乓球 若只去超市购买的费用为: (元)············································································· 6分 若在超市购买10副球拍.去超市购买余下的乒乓球的费用为: (元)··············································································· 7分 最佳方案为:只在超市购买10副球拍.同时获得送30个乒乓球.然后去超市按九折购买90个乒乓球． 8分 【查看更多】

     

    题目列表(包括答案和解析)

    16、问题背景：
    A、B两家超市都有某种品牌的乒乓球拍和乒乓球出售，且每副球拍的标价都为50元，每个乒乓球的标价都为2元．现两家超市正在促销，A超市所有商品均打九折销售，而B超市买一副乒乓球拍送4个乒乓球．若仅考虑购买球拍和乒乓球的费用．
    （1）如果只在某一家超市购一副乒乓球拍和10个乒乓球，问去A超市还是B超市买更合算？
    迁移运用：
    （2）某乒乓球训练馆准备购买n副该种品牌的乒乓球拍，每副球拍配k（k≥4）个乒乓球．如果只在某一家超市购买，问去A超市还是B超市买更合算？
    拓展延伸：
    （3）若乒乓球训练馆准备购买n副该种品牌的乒乓球拍，每副球拍配20个乒乓球．请通过计算设计出最省钱的购买方案．

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    列方程（组）解应用题：
    张欣的妈妈用面值为100元的购物券去超市购物．她们想购买的两种商品分别是：每袋8元的洗衣粉和每袋15元的巧克力，且打算两种商品共买9袋．请问她们应该购买两种商品各几袋，才能使购物券恰好用完．

    查看答案和解析>>

    列方程(组)解应用题
    张欣的妈妈用面值为100元的购物券去超市购物。她们想购买的两种商品分别是：每袋8元的洗衣粉和每袋15元的巧克力，且打算两种商品共买9袋。请问她们应该购买两种商品各几袋，才能使购物券恰好用完？

    查看答案和解析>>

    列方程(组)解应用题

    张欣的妈妈用面值为100元的购物券去超市购物。她们想购买的两种商品分别是：每袋8元的洗衣粉和每袋15元的巧克力，且打算两种商品共买9袋。请问她们应该购买两种商品各几袋，才能使购物券恰好用完？

     

    查看答案和解析>>

    列方程（组）解应用题：
    张欣的妈妈用面值为100元的购物券去超市购物．她们想购买的两种商品分别是：每袋8元的洗衣粉和每袋15元的巧克力，且打算两种商品共买9袋．请问她们应该购买两种商品各几袋，才能使购物券恰好用完．

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