102×0.45怎么简便

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102×0.45怎么简便

102×0.45怎么简便
102×0.45怎么简便

102×0.45怎么简便
102×0.45
=(100+2)*0.45
=45+0.9
=45.9

102×0.45
=(100+2)×0.45
=45 +0.9
=45.9

102×0.45=(100+2)×0.45=100×0.45+2×0.45=45+0.9=45.9

102×0.45
=(100+2)×0.45
=100×0.45+2×0.45
=45 +0.9
=45.9

102×0.45
=(100+2)×0.45
=100×0.45+2×0.45
=45 +0.9
=45.9