800²-1600×798+198² 99²+198+1分之100 简便方法计算啊①800²-1600×798+198² ② 99²+198+1分之100
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![800²-1600×798+198² 99²+198+1分之100 简便方法计算啊①800²-1600×798+198² ② 99²+198+1分之100](/uploads/image/z/240505-25-5.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%E5%95%8A%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)
800²-1600×798+198² 99²+198+1分之100 简便方法计算啊①800²-1600×798+198² ② 99²+198+1分之100
800²-1600×798+198² 99²+198+1分之100 简便方法计算啊
①800²-1600×798+198² ② 99²+198+1分之100
800²-1600×798+198² 99²+198+1分之100 简便方法计算啊①800²-1600×798+198² ② 99²+198+1分之100
① 800²-1600×798+198²
=(800-798)^2+198^2-798^2
=4+(198-798)(198+798)
=4-600*(1000-4)
=4-600000+2400
=-597596
② 99²+198+1分之100
=(99+1)^2-1+1/100
=10000-1+1/100
=9999.01