1003*997的简便运算
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![1003*997的简便运算](/uploads/image/z/250766-62-6.jpg?t=1003%2A997%E7%9A%84%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
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1003*997的简便运算
1003*997的简便运算
1003*997的简便运算
=(1000+3)(1000-3)
=1000000-9
=999991
=(1000+3)(1000-3)=1000^2-3^2=1000000-9=9999991
=(1000+3)*(1000-3)
=1000^2-9
=1000000-9
=999991
= (1000+3)(1000-3)
= 1000^2 - 3^2
= 1000000 - 9
= 999991