用递等式!
72*125
=(8*9)*125
=9*(8*125)
=9*1000
=9000
=(8*9)*125
=9*(8*125)
=9*1000
=9000
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第1个回答 2008-07-18
72=2×2×2×3×3
125=5×5×5
72×125=10×10×10×9=9000
125=5×5×5
72×125=10×10×10×9=9000
第2个回答 2008-07-18
72*125
=(9*8)*125
=9*(8*125)
=9*1000
=9000
=(9*8)*125
=9*(8*125)
=9*1000
=9000
第3个回答 2008-07-18
72*125
=9*8*125
=9*(8*125)
=9*1000
=9000
=9*8*125
=9*(8*125)
=9*1000
=9000
第4个回答 2008-07-18
72*125
=9*8*125
=9*(8*125)
=9*1000
=9000
=9*8*125
=9*(8*125)
=9*1000
=9000