0.82×4.6+8.2×0.56能不能简便？
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0.82×4.6+8.2×0.56
=0.82×4.6+0.82×5.6
=0.82×4.6+0.82×5.4+0.82×0.2
=0.82×(4.6+5.4)+0.82×0.2
=0.82×10+0.82×0.2
=8.2+0.164
=8.364
=0.82×4.6+0.82×5.6
=0.82×4.6+0.82×5.4+0.82×0.2
=0.82×(4.6+5.4)+0.82×0.2
=0.82×10+0.82×0.2
=8.2+0.164
=8.364
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