如题所述
第1个回答 2015-04-11
原式=(12x12x2x2)x(17x13)x38
=(3x3)x(2x2x2x2x2x2)x221x38
=9x221x2x(32x38)
=9x221x2x1216
=1989x1216x2
=(2000-11)x2432
=2000x2432-11x2432
=4864000-(10+1)x2432
=4864000-24320-2432
=4864000-26752
=4837248
=(3x3)x(2x2x2x2x2x2)x221x38
=9x221x2x(32x38)
=9x221x2x1216
=1989x1216x2
=(2000-11)x2432
=2000x2432-11x2432
=4864000-(10+1)x2432
=4864000-24320-2432
=4864000-26752
=4837248
第2个回答 2015-04-07
12+26=38,这道题无简便方法