999乘28加28加9999乘72加72的简便运算
答案:5 悬赏:80 手机版
解决时间 2021-02-15 00:00
- 提问者网友:暮烟疏雨之际
- 2021-02-14 03:34
999乘28加28加9999乘72加72的简便运算
最佳答案
- 五星知识达人网友:长青诗
- 2021-02-14 04:05
解:
999×28+28+9999×72+72
=(999+1)×28+(9999+1)×72
=1000×28+10000×72
=28000+720000
=748000
999×28+28+9999×72+72
=(999+1)×28+(9999+1)×72
=1000×28+10000×72
=28000+720000
=748000
全部回答
- 1楼网友:孤独入客枕
- 2021-02-14 07:33
应用乘法分配律 999 X 28 + 28 =(999 + 1)X 28 =28000
同理9999 X 72 = (9999+1) X 72 = 720000
720000 + 28000 = 748000
同理9999 X 72 = (9999+1) X 72 = 720000
720000 + 28000 = 748000
- 2楼网友:你可爱的野爹
- 2021-02-14 07:12
999*28+28+9999*72+72
=(999+1)*28+(9999+1)*72
=28000+720000
=748000
=(999+1)*28+(9999+1)*72
=28000+720000
=748000
- 3楼网友:独钓一江月
- 2021-02-14 06:45
999x28+28+9999x72+72
=28x(999+1)+72x(9999+1)
=28x1000+72x10000
=28000+720000
=748000
=28x(999+1)+72x(9999+1)
=28x1000+72x10000
=28000+720000
=748000
- 4楼网友:摆渡翁
- 2021-02-14 05:18
999×28+28+9999×72+72=
(999+1)×28+(9999+1)×72=
1000×28+10000×72=
28000+720000=748000
(999+1)×28+(9999+1)×72=
1000×28+10000×72=
28000+720000=748000
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