5.8*0.8简算.”.”.

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5.8*0.8简算.”.”.
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5.8*0.8简算.”.”.
5.8*0.8简算.”.”.

5.8*0.8简算.”.”.
5.8×0.8
=(5+0.8)×0.8
=5×0.8+0.8×0.8
=4+0.64
=4.64

5.8×0.8=(5+0.8)×0.8=5×0.8+0.8×0.8=4+0.64=4.64