简算:(1)1996×19971997-1997×19961996 (2)27.3×5.4+2.73×56-27.3

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简算:(1)1996×19971997-1997×19961996(2)27.3×5.4+2.73×56-27.3简算:(1)1996×19971997-1997×19961996(2)27.3×5.

简算:(1)1996×19971997-1997×19961996 (2)27.3×5.4+2.73×56-27.3
简算:(1)1996×19971997-1997×19961996 (2)27.3×5.4+2.73×56-27.3

简算:(1)1996×19971997-1997×19961996 (2)27.3×5.4+2.73×56-27.3
:(1)1996×19971997-1997×19961996
=1996×1997×10001-1997×1996×10001
=0;
(2)27.3×5.4+2.73×56-27.3
=27.3×(5.4+5.6-1)
=27.3×10
=273