222×333 + 334×111
= 111×2×333 + 334×111
= 111×666 + 334×111
= 111×(666 + 334)
= 111×1000
= 111000
5×999+5×99×7+7+3×9+3+9
=5×(1000-1)+35×(100-1)+(27+3)+(9+7)
=5000-5+3500-35+30+16
=5000+3500-5-35+30+16
=8500-40+46
=8500+6
=8506
776—38+124+262
=(776+124)+(262-38)
=900+224
=1124
487—(46—187)—154
=487-46+187-154
=487×2-(46+154)
=974-200
=774
36×68+68×27—63×58
=68×(36+27-63)
=68×5
=430
99999×77778+66666×33333
=99999×77778+22222×(3×33333)
=99999×(77778+22222)
=9999×100000
=999900000