179×83 89×72 怎么简便运算

2024-11-25 21:57:17
推荐回答(5个)
回答1:

解: 179×83
=179×(80+3)
=179×80+179×3
=14320+537
=14857
89×72
=(90-1)×72
=90×72-72
=6480-72
=6408

回答2:

179*83

=179*(或旁80+3)

=179*80+179*3

=14320+537

=14857

89*72

=(90-1)缓团如扰启*72
=90*72-72

=6480-72
=6408

回答3:

179×83
=179×(漏春80+3)
=179×80+179×3
= 14 320+ 537
=14857

89×72
=(90-1)改搜亩核森×72
=90×72-72
= 6480-72
=6408

回答4:

掏出手机拨打过去

回答5:

179*83 = (131+48)*(肆型笑131-48)
=(租枯130+1)裂含*(130+1)-(50-2)*(50-2)
=16900+260+1 -(2500-200+4)
=16900-2300 + 260+1-4
=14600+260-3
=14860-3
=14857
89*72=(80+9)(80-8)
=6400 + 80 -72
=6400+8
=6408