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=（100+2）*0.45=45+0.9=45.9102×0.45=(100+2)×0.45=45+0.9=45
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