跪求小学一年级数学题：请列出二道竖式，万分感谢！！
\u5c0f\u5f1f\u8dea\u6c422\u9053\u5c0f\u5b666\u5e74\u7ea7\u6570\u5b66\u9898\u7b54\u6848~1.\u516d2\u73ed\u6709\u5b66\u751f45\u4eba\uff0c\u7537\u751f\u4eba\u6570\u662f\u5973\u751f\u4eba\u6570\u768487.5%\u3002\u516d2\u73ed\u7537\uff0c\u5973\u751f\u5404\u6709\u591a\u5c11\u4eba\uff1f
\u5973\u751f\u6709
45\u00f7\uff081\uff0b87.5\uff05\uff09\uff1d24\u4eba
\u7537\u751f\u6709
24\u00d787.5\uff05\uff1d21\u4eba
2.\u4fee\u8def\u961f\u4fee\u4e00\u6761\u8def\uff0c\u5df2\u7ecf\u4fee\u4e865\u5206\u4e4b2\uff0c\u518d\u4fee300\u7c73\u53ef\u4ee5\u5b8c\u6210\u4efb\u52a1\u7684\u4e00\u534a\u3002\u8fd9\u6761\u8def\u957f\u591a\u5c11\u7c73\uff1f
300\u00f7\uff082\u5206\u4e4b1\uff0d5\u5206\u4e4b2\uff09\uff1d3000\u7c73
\u697c\u4e0a\u8fd9\u4f4d\u670b\u53cb\u53ef\u80fd\u662f\u7c97\u5fc3\u539f\u56e0\u7b2c\u4e8c\u9898\u89e3\u9519\u4e86
2,\u8bbe\u6a58\u5b50\u5355\u4ef7\u4e3aX\u5143\uff0c\u5219\u82f9\u679c\u5355\u4ef7\u4e3ax+2.6\u5143
5x+4+\uff08x+2.6\uff09=23
x=1.4
\u82f9\u679c\u5355\u4ef7\uff1ax+2.6=1.4+2.6=4\u5143
\u82f9\u679c\u548c\u6a58\u5b50\u7684\u5355\u4ef7\u548c\uff1a1.4+4=5.4\u5143
\u7b2c\u4e00\u9898\u8d5e\u6210\u4e8c\u697c\u670b\u53cb\u7684\u89e3\u6cd5\uff0c\u5475\u54751
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绛旓細绗竴棰橈細8+3-4=7鎴7+4-4=7 绗簩棰橈細7-4+4=7鎴8-4+3=7
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