1533-497-599简便计算

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1533-497-599简便计算
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1533-497-599简便计算
1533-497-599简便计算

1533-497-599简便计算
1533-497-599
=1533-(500-3)-(600-1)
=1533-500-600+3+1
=433+4
=437

1533-497-599
1533-500-600+3+1
=433+4
=437

1533-497-599
=1533-(500-3)-(600-1)
=1533-500+3-600+1
=(1533-500-600)+4
=433+4
=437

1533-500+3-600+1
=1033-600+4
=433+4
=437

1500-500-600+(33+3+1)=437