0.25×0.37+2.5×0.3的递等式？ 5
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0.25×0.37+2.5×0.3
=0.25×（0.3+0.07）+2.5×0.3
=0.25×0.3+0.25×0.07+0.75
=0.075+0.0175+0.75
=0.825+0.0175
=0.8425
=0.25×（0.3+0.07）+2.5×0.3
=0.25×0.3+0.25×0.07+0.75
=0.075+0.0175+0.75
=0.825+0.0175
=0.8425
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