19小题怎么做
答案:2 悬赏:30 手机版
解决时间 2021-11-16 03:14
- 提问者网友:嘚啵嘚啵
- 2021-11-15 19:09
19小题怎么做
最佳答案
- 五星知识达人网友:几近狂妄
- 2021-11-15 20:30
999999999×999999999+1999999999
=999999999×999999999+1000000000+999999999
=999999999×(999999999+1)+1000000000
=999999999×1000000000+1000000000
=(999999999+1)×1000000000
=1000000000×1000000000
=1000000000000000000
答案是1后边18个0.
=999999999×999999999+1000000000+999999999
=999999999×(999999999+1)+1000000000
=999999999×1000000000+1000000000
=(999999999+1)×1000000000
=1000000000×1000000000
=1000000000000000000
答案是1后边18个0.
全部回答
- 1楼网友:逃夭
- 2021-11-15 20:59
1(9个9)+(9个9)x(9个9)=1(9个0)+(9个9)((9个9)+1)=1(9个0)x1(9个0)
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