33×34+34×35+······37×38如何 - 知识问答

33×34+34×35+······37×38如何计算

2个回答

33*34+34*35+35*36+36*37+37*38
=1122+(34*35+35*36) +(36*37+37*38)
=1122+2*35^2+2*37^2
=1122+2450+2738
=(1122+2738)+2450
=3860+2450
=6310

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