简算题，帮帮忙

来源：百度知道 编辑：UC知道 时间：2024/06/04 04:37:50
8.13-(4.76-1.87)-2.24
19961997x19971996-19961996x19971997
写出详细过程

8.13-(4.76-1.87)-2.24
=8.13-4.76+1.87-2.24
=(8.13+1.87)-(4.76+2.24)
=10-7
=3

19961997x19971996-19961996x19971997
令a=19961996
则原式=(a+1)(a+10000)-a(a+10001)
=(a+1)(a+10000)-a(a+10000+1)
=a(a+10000)+1*(a+10000)-a(a+10000)-a
=a+10000-a
=10000

8.13-(4.76-1.87)-2.24
=8.13-4.76+1.87-2.24
=8.13+1.87-4.76-2.24
=(8.13+1.87)-(4.76+2.24)
=10-7
=3

19961997*19971996-19961996*19971997
=(19961996+1)*19971996-19961996*19971997
=19961996*19971996+1*19971996-19961996*19971997
=19961996*(19971996-19971997)+19971996
=19961996*(-1)+19971996
=19971996-19961996
=10000

保证没问题！谢谢采纳！

100+999 =1099