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0.89×12.5-0.9×1.25的简便计算
人气:333 ℃ 时间:2020-04-18 13:21:41
解答
0.89×12.5-0.9×1.25
=0.89×12.5-0.09×12.5
=(0.89-0.09)×12.5
=0.8×12.5
=10
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