3.5+2.9×0.87怎么算?

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3.5+2.9×0.87怎么算?

3.5+2.9×0.87怎么算?
3.5+2.9×0.87怎么算?

3.5+2.9×0.87怎么算?
3.5+2.9×0.87
＝3.5+(3-0.1)×0.87
＝3.5+2.61-0.087
=6.11-(0.1-0.013)
=6.01+0.013
=6.023

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