怎样简便计算15+16+17+18+19+20+21+22
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![怎样简便计算15+16+17+18+19+20+21+22](/uploads/image/z/55312-16-2.jpg?t=%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%9715%2B16%2B17%2B18%2B19%2B20%2B21%2B22)
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怎样简便计算15+16+17+18+19+20+21+22
怎样简便计算15+16+17+18+19+20+21+22
怎样简便计算15+16+17+18+19+20+21+22
15+16+17+18+19+20+21+22
=(15+22)+(16+21)+(17+20)+(18+19)
=37×4
=148
15+16+17+18+19+20+21+22
=(15+22)×8/2
=37×4
=148
15+16+17+18+19+20+21+22
=(15+22)*4
=37*4
=148
(15+22)*8/2=148