2个回答
展开全部
83×102-83×298×199
=83 x(100+2-298x199)
=83x[100+2-(300-2)x199]
=83x[100+2-300x199+2x199]
=83x[100+2-300x(200-1)+2x(200-1)]
=83x[100+2-300x200+300+2x200-2]
=83x[100-300x200+300+400]
=83x[100x1-100x3x200+100x3+100x4]
=83x100[1-3x200+3+4]
=8300x[1+3+4-600]
=8300x(-592)
=-4913600
=83 x(100+2-298x199)
=83x[100+2-(300-2)x199]
=83x[100+2-300x199+2x199]
=83x[100+2-300x(200-1)+2x(200-1)]
=83x[100+2-300x200+300+2x200-2]
=83x[100-300x200+300+400]
=83x[100x1-100x3x200+100x3+100x4]
=83x100[1-3x200+3+4]
=8300x[1+3+4-600]
=8300x(-592)
=-4913600
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展开全部
83×102-83×298×199
=83 x(100+2-298x199)
=83x[100+2-(300-2)x199]
=83x[100+2-300x199+2x199]
=83x[100+2-300x(200-1)+2x(200-1)]
=83x[100+2-300x200+300+2x200-2]
=83x[100-300x200+300+400]
=83x[100x1-100x3x200+100x3+100x4]
=83x100[1-3x200+3+4]
=8300x[1+3+4-600]
=8300x(-592)
=-4913600
=83 x(100+2-298x199)
=83x[100+2-(300-2)x199]
=83x[100+2-300x199+2x199]
=83x[100+2-300x(200-1)+2x(200-1)]
=83x[100+2-300x200+300+2x200-2]
=83x[100-300x200+300+400]
=83x[100x1-100x3x200+100x3+100x4]
=83x100[1-3x200+3+4]
=8300x[1+3+4-600]
=8300x(-592)
=-4913600
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