用简便方法计算98*99-69*33 26*99
答案:5 悬赏:0 手机版
解决时间 2021-03-20 18:50
- 提问者网友:我一贱你就笑
- 2021-03-20 05:34
用简便方法计算98*99-69*33 26*99
最佳答案
- 五星知识达人网友:怀裏藏嬌
- 2021-03-20 06:24
如图
全部回答
- 1楼网友:愁杀梦里人
- 2021-03-20 08:47
98*99-69*33+26*99
=(98-69+26)*99
=55*99
=55*(100-1)
=5500-55
=5445
=(98-69+26)*99
=55*99
=55*(100-1)
=5500-55
=5445
- 2楼网友:往事隔山水
- 2021-03-20 08:30
98*99-69*33+26*99
=98*99-23*99+26*99
=(98-23+26)*99
=101*99
=9999
=98*99-23*99+26*99
=(98-23+26)*99
=101*99
=9999
- 3楼网友:笑迎怀羞
- 2021-03-20 08:18
楼主所给是98×99-69×33+26×99吧?
解:
98×99-69×33+26×99
=98×99-23×3×33+26×99
=(98-23+26)×99
=101×99
=(100+1)×(100-1)
=100²-1²
=10000-1
=9999
解:
98×99-69×33+26×99
=98×99-23×3×33+26×99
=(98-23+26)×99
=101×99
=(100+1)×(100-1)
=100²-1²
=10000-1
=9999
- 4楼网友:迟山
- 2021-03-20 06:56
26+26x99 =26+26x(100-1) =26+2600-26 =26-26+2600 =2600
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