4.5×5.4+5.5×4.6简便计算怎么算?
1个回答
4.5×5.4+5.5×4.6
=4.5×5.4+4.5×4.6+4.6
=4.5×(5.4+4.6)+4.6
=4.5×10+4.6
=45+4.6
=49.6
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