18.21+97.2/(1.8+0.2)简便计算
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18.21+97.2/(1.8+0.2)简便计算
18.21+97.2/(1.8+0.2)简便计算
18.21+97.2/(1.8+0.2)简便计算
18.21+97.2/(1.8+0.2)
=18.21+97.2/2
=18.21+48.6
=18.21+50-1.4
=68.21-1.4
=66.81
18.21+97.2/(1.8+0.2
=18.21+97.2x2
=18.21+194.4
=212.61