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9.55×2.25等于几
2个回答
展开全部
9.55×2.25
=(10-0.45)×2.25
=22.5-0.45×2.25
=22.5-(0.5-0.05)×2.25
=22.5-0.5×2.25+0.05×2.25
=22.5-1.125+0.1125
=22.6125-1.125
=21.4875
=(10-0.45)×2.25
=22.5-0.45×2.25
=22.5-(0.5-0.05)×2.25
=22.5-0.5×2.25+0.05×2.25
=22.5-1.125+0.1125
=22.6125-1.125
=21.4875
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