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      <title>一年级上册五单元 连加、连减、加减混合专项50道练习题</title>
      <link>https://www.pkvpk.com/portal.php?mod=view&amp;aid=4728</link>
      <description><![CDATA[计算法则：全部从左往右依次计算一、连加（15题）1. 2+3+4=2. 1+5+2=3. 3+2+5=4. 4+1+3=5. 2+2+6=6. 5+3+1=7. 1+4+4=8. 3+3+2=9. 2+5+3=10. 4+2+3=11. 1+3+6=12. 5+2+2=13. 3+1+5=14. 2+4+3=15. 1+2+7=二、连减（15  ...]]></description>
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      <pubDate>Sun, 28 Jun 2026 09:42:00 +0000</pubDate>
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      <title>一年级上册第五单元 大括号看图列式专项举一反三50道题</title>
      <link>https://www.pkvpk.com/portal.php?mod=view&amp;aid=4727</link>
      <description><![CDATA[题型说明1. 大括号下面有问号：求总数 → 加法2. 大括号一侧有问号：求一部分 → 减法3. 统一答题格式：□○□=□一、基础加法（问号在大括号下方，共15题）1. 左边3个苹果，右边4个苹果，大括号下方？  3+4=72. 左  ... ...]]></description>
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      <pubDate>Sun, 28 Jun 2026 09:30:00 +0000</pubDate>
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