1567+1999的简便运算
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![1567+1999的简便运算](/uploads/image/z/5262623-71-3.jpg?t=1567%2B1999%E7%9A%84%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97)
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1567+1999的简便运算
1567+1999的简便运算
1567+1999的简便运算
1567+1999
=1567+2000-1
=3567-1
=3566
1567+1999
=1567+2000-1
=3567-1
=3566
1567+1999
=1567+(2000-1)
=3567-1
=3566