一道数奥题和算式的简便算法!
(1)1120×122112211221-1221×112011201120(2)1234××432143214321-4321×123412341234(3)2002×...
(1)1120×122112211221-1221×112011201120 (2)1234××432143214321-4321×123412341234 (3)2002×60066006-3003×40044004 两个数相除的商是9,如果把被除数、除数和商相加得279。求被除数和除数。 数奥题的解决方法尽量简单,前面几道算式注意一定要用简便方法计算,如: 2003×200220022002-2002×200320032003 =2003×2002×100010001-2002×2003×100010001 =0 高人解答,快快快!好的加分!!!!
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(1)1120×122112211221-1221×112011201120
=1120×1221×100010001-1221×1120×100010001
=0
(2)1234×432143214321-4321×123412341234
=1234×4321×100010001-4321×1234×100010001
=0
(3)2002×60066006-3003×40044004
=2×6×1001×10011001-3×4×1001×10011001
=12×1001×10011001-12×1001×10011001
=0
(4)商为9说明被除数是除数的9倍。279-商=除数×9+除数
除数为270÷(9+1)=27
被除数为27×9=243
=1120×1221×100010001-1221×1120×100010001
=0
(2)1234×432143214321-4321×123412341234
=1234×4321×100010001-4321×1234×100010001
=0
(3)2002×60066006-3003×40044004
=2×6×1001×10011001-3×4×1001×10011001
=12×1001×10011001-12×1001×10011001
=0
(4)商为9说明被除数是除数的9倍。279-商=除数×9+除数
除数为270÷(9+1)=27
被除数为27×9=243
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