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51问答网 > 用简便方法计算：19.4x6.1+2.3？

用简便方法计算：19.4x6.1+2.3？

2025-04-08 10:45:32

推荐回答（4个）

回答1：

19.4x6.1+2.3
=(20-0.6)×6.1+2.3
=122-3.66+2.3
=122-1.36
=120.64

回答2：

简便方法：
19.4×6.1+2.3
＝（20-0.6）×6.1+2.3
＝20×6.1-0.6×6.1+2.3
＝122-3.66+2.3
＝124.3-3.66
＝120.64

回答3：

19.4*6.1+2.3
=19.4*（6+0.1）+2.3
=19.4*6+19.4*0.1+2.3
=116.4+1.94+2.3
=118.34+2.3
=120.64

回答4：

＝19.4*6.1+2.3
＝118.34+2.3
＝120.64

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