14.2乘6.51加3.49乘4.2简算
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解决时间 2021-01-24 05:19
- 提问者网友：嘚啵嘚啵
- 2021-01-23 17:48
14.2乘6.51加3.49乘4.2简算
最佳答案
- 五星知识达人网友：一把行者刀
- 2021-01-23 19:21
14.2×6.51+3.49×4.2
=(10+4.2)×6.51+3.49×4.2
=10×6.51+4.2×6.51+3.49×4.2
=10×6.51+4.2×(6.51+3.49)
=10×6.51+4.2×10
=10×(6.51+4.2)
=10×10.71
=107.1
=(10+4.2)×6.51+3.49×4.2
=10×6.51+4.2×6.51+3.49×4.2
=10×6.51+4.2×(6.51+3.49)
=10×6.51+4.2×10
=10×(6.51+4.2)
=10×10.71
=107.1
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