如题所述
åå¼
=22x52+27x48
=22x52+(22+5)x48
=22x52+22x48+5x48
=22x(52+48)+240
=22x100+240
=2200+240
=2440
ä¾åèã
=22x52+27x48
=22x52+(22+5)x48
=22x52+22x48+5x48
=22x(52+48)+240
=22x100+240
=2200+240
=2440
ä¾åèã
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第1个回答 2016-05-13
没有简便算法
22x52+27x48
=1144+1296
=2440
22x52+27x48
=1144+1296
=2440