22*77+33*66+44*55+66*88 简便计算
问题描述：
22*77+33*66+44*55+66*88 简便计算
答
22*77+33*66+44*55+66*88
=22x11x7+22x11x3x3+22x11x10+22x11x24
=22x11x(7+9+10+24)
=22x11x50
=1100x11
=12100
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