給出如下十個(gè)自然數(shù):6907,73,769,3043,19,1480,373,41321,21768,178.請你說出25758是其中哪幾個(gè)數(shù)之和?
分析:將十個(gè)數(shù)從小到大排列:19,73,178,373,769,1480,3043,6907,21768,41321,發(fā)現(xiàn)左邊連續(xù)幾個(gè)數(shù)之和都小于右邊緊鄰的那個(gè)數(shù).如19<73,19+73=92<178,19+73+178=270<373,19+73+178+373=643<769,等等.因此,從21768開始,隔數(shù)相加,即21768+3043+769+178=25758.
解答:解:將十個(gè)數(shù)從小到大排列:19,73,178,373,769,1480,3043,6907,21768,41321,從21768開始,隔數(shù)相加,得
21768+3043+769+178=25758.
點(diǎn)評:認(rèn)真觀察數(shù)據(jù),先把數(shù)據(jù)按一定順序排列,根據(jù)其特點(diǎn),解決問題.
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