800²-1600×798+198² 99²+198+1分之100 简便方法计算①800²-1600×798+198² ② 99²+198+1分之100求步骤嗷哦啊哦啊QAQ
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![800²-1600×798+198² 99²+198+1分之100 简便方法计算①800²-1600×798+198² ② 99²+198+1分之100求步骤嗷哦啊哦啊QAQ](/uploads/image/z/431114-50-4.jpg?t=800%26%23178%3B-1600%C3%97798%2B198%26%23178%3B+99%26%23178%3B%2B198%2B1%E5%88%86%E4%B9%8B100+%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97%E2%91%A0800%26%23178%3B-1600%C3%97798%2B198%26%23178%3B+++++++++++++++%E2%91%A1++99%26%23178%3B%2B198%2B1%E5%88%86%E4%B9%8B100%E6%B1%82%E6%AD%A5%E9%AA%A4%E5%97%B7%E5%93%A6%E5%95%8A%E5%93%A6%E5%95%8AQAQ)
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800²-1600×798+198² 99²+198+1分之100 简便方法计算①800²-1600×798+198² ② 99²+198+1分之100求步骤嗷哦啊哦啊QAQ
800²-1600×798+198² 99²+198+1分之100 简便方法计算
①800²-1600×798+198² ② 99²+198+1分之100
求步骤嗷哦啊哦啊QAQ
800²-1600×798+198² 99²+198+1分之100 简便方法计算①800²-1600×798+198² ② 99²+198+1分之100求步骤嗷哦啊哦啊QAQ
①800²-1600×798+198)²=800)²-2×800×798+(798-600)²
=800²-2×800×798+798²-2×798×600+600²=(800-798)²-(798-600)×600=4-198×600=4-200×600+2×600=4-120000+1200=-118796
② 什么叫“1分之100”?就是100吗?如果是,则:99+198+100=99²+2×99×1+100=99²+2×99×1+1+99=(99+1)²+99=10000+99=10099