5.45×13+1.3*45.4-12.5*1.28*8简便运算
答案:3 悬赏:70 手机版
解决时间 2021-11-11 01:23
- 提问者网友：抽煙菂渘情少年
- 2021-11-10 08:01
5.45×13+1.3*45.4-12.5*1.28*8简便运算
最佳答案
- 五星知识达人网友：酒醒三更
- 2021-11-10 09:05
5.45×13+1.3×45.4-12.5×1.28×8
=5.45×13+13×4.54-12.5×8×1.28
=（5.45+4.54）×13-100×1.28
=9.99×13-128
=（10-0.01）×13-128
=10×13-0.01×13-128
=130-0.13-128
=130-128-0.13
=2-0.13
=1.87
=5.45×13+13×4.54-12.5×8×1.28
=（5.45+4.54）×13-100×1.28
=9.99×13-128
=（10-0.01）×13-128
=10×13-0.01×13-128
=130-0.13-128
=130-128-0.13
=2-0.13
=1.87
全部回答
- 1楼网友：罪歌
- 2021-11-10 09:55
5.45×13+1.3x45.4-12.5x1.28x8
=13x(5.45+4.54)-12.5x8x1.28
=13x9.99-100x1.28
=13x10-13x0.01-128
=130-128-0.13
=2-0.13
=1.87
=13x(5.45+4.54)-12.5x8x1.28
=13x9.99-100x1.28
=13x10-13x0.01-128
=130-128-0.13
=2-0.13
=1.87
- 2楼网友：不甚了了
- 2021-11-10 09:33
解：
5.45×13+1.3×45.4-12.5×1.28×8
=5.45×13+13×4.54-12.5×8×1.28
=(5.45+4.54)×13-100×1.28
=9.99×13-128
=(10-0.01)×13-128
=10×13-0.01×13-128
=130-0.13-128
=130-128-0.13
=2-0.13
=1.87
为让楼主看清楚解题过程，上述书写的有些啰嗦，还望楼主理解。
5.45×13+1.3×45.4-12.5×1.28×8
=5.45×13+13×4.54-12.5×8×1.28
=(5.45+4.54)×13-100×1.28
=9.99×13-128
=(10-0.01)×13-128
=10×13-0.01×13-128
=130-0.13-128
=130-128-0.13
=2-0.13
=1.87
为让楼主看清楚解题过程，上述书写的有些啰嗦，还望楼主理解。
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