
55x224-24x25的简便运算?
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55x224-24x25
=(30+25)x224-24x25
=30x224+25x224-24x25
=6720+25x(224-24)
=6720+25x200
=6720+5000
=11720
=(30+25)x224-24x25
=30x224+25x224-24x25
=6720+25x(224-24)
=6720+25x200
=6720+5000
=11720
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