1567+1999的简便运算
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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
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