100.1×99.8+10.01怎么巧算
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![100.1×99.8+10.01怎么巧算](/uploads/image/z/14438929-49-9.jpg?t=100.1%C3%9799.8%2B10.01%E6%80%8E%E4%B9%88%E5%B7%A7%E7%AE%97)
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100.1×99.8+10.01怎么巧算
100.1×99.8+10.01怎么巧算
100.1×99.8+10.01怎么巧算
100.1×99.8+10.01
=10.01×998+10.01
=10.01×999
=10.01×1000-10.01
=10010-10.1
=9999.9
100.1×99.8+10.01
=100.1×99.8+100.1×0.1
=100.1×(99.8+0.1)
=(100+0.1)×(100-0.1)
=10000-0.01
=9999.99