Question

1.39×0.25×3 0.25×1.39怎么简便运算？

Answer 1

1.39×0.25×3+0.25×1.39怎么简便运算？
=1.39×0.75+0.25×1.39
=1.39×（0.75+0.25）
=1.39×1
=1.39
望采纳 谢谢~~

Answer 2

可以简便计算，运用乘法结合律进行凑整计算，也就是1.39×0.25×3+0.25×1.39=1.39×0.25×（3+1）=1.39×0.25×4=1.39×（0.25×4）=1.39×1=1.39，谢谢

Answer 3

如下图所示:

Answer 4

由题目可得式子1.39*0.25*30.25*1.39，可以将30.25看成小数121/4，1.39*0.25*30.25*1.39＝1.39*1/4*121/4*1.39＝121/16*1.39*1.39＝121*1.39*1.39/16＝11*1.39*11*1.39/16＝11*1.39/4*11*1.39/4＝(11*1.39/4)²＝(15.29/4)²

Answer 5

答：1.39×0.25×3×0.25×1.39

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=1.39×0.25×(3+1)

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=1.39×0.25×4

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=1.39×1

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=1.39