= 217 nhé cậu
TK MÌNH NHA !! THANK YOU VERY MUCH
12 + 13 + 14 + 15 + 16 + 17 + 18 + 21 + 22 +22 +23 + 24 = 217 nhé
\(12+13+14+15+16+17+18+21+22+23+24\)
\(=\left(12+18\right)+\left(13+17\right)+\left(14+16\right)+\left(15+24+21\right)+\left(22.2+23\right)\)
\(=30+30+30+60+67\)
\(=217\)
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