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5.4x4.6+3.4x4.6+4.6简便方法怎样简便?
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5.4x4.6+3.4x4.6+4.6简便方法怎样简便?
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答案和解析
5.4x4.6+3.4x4.6+4.6
=4.6×(5.4+3.4+1)
=4.6×9.8
=4.6×(10-0.2)
=4.6×10-4.6×0.2
=46-0.98
=45.02
=4.6×(5.4+3.4+1)
=4.6×9.8
=4.6×(10-0.2)
=4.6×10-4.6×0.2
=46-0.98
=45.02
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