36乘以111加888乘以8和99乘以99加199怎样简便计算?55,我和老妈苦战一晚上也没想出来啊

36×111+888×8
=36×111+111×8×8
=111×(36+8×8)
=111×(36+64)
=111×100
=11100
99×99+199
=99×99+99+100
=99×(99+1)+100
=99×100+100
=9900+100
=10000