计算1.22²X900-1.33²X400_数学解答

计算1.22²X900-1.33²X400

人气：403 ℃　时间：2020-03-30 09:08:31

解答

1.22²X900-1.33²X400
=(1.22*30)²-(1.33*20)²
=36.6²-26.6²
=(36.6-26.6)(36.6+26.6)
=10*63.2
=632