如题所述
240x56+21x480+240
=240x56+21x240x2+240x1
=240x(56+21x2+1)
=240x99
=240x(100-1)
=240x100-240x1
=24000-240
=23760
望题主采纳!
=240x56+21x240x2+240x1
=240x(56+21x2+1)
=240x99
=240x(100-1)
=240x100-240x1
=24000-240
=23760
望题主采纳!
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第1个回答 2020-04-07
=240x56+21x2x240+240x1
=240x(56+42+1)
=240x99
=240x(100-1)
=240x100-240x1
=24000-240
=23760本回答被网友采纳
=240x(56+42+1)
=240x99
=240x(100-1)
=240x100-240x1
=24000-240
=23760本回答被网友采纳