54.9x0.38简算?9.8x25简算?4.05+37.85简算?

yummya2022-10-04 11:39:541条回答

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真实的选择共回答了14个问题 | 采纳率92.9%: 54.9×0.38
=(55-0.1)×0.38
=55×0.38-0.038
=11×1.9-0.038
=20.9-0.038
=20.862
9.8×25
=(10-0.2)×25
=250-5
=245
4.05+37.85=41.9; 1年前

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