2942+2756+4172+8599+107143+177182.
问题描述:
2942+2756+4172+8599+107143+177182.
答
2942+2756+4172+8599+107143+177182,
=(3000-58)+(2800-44)+(4200-28)+(8600-1)+(107100+43)+(177100+82),
=(3000+2800+4200+8600+107100+177100)-(58+44+28+1-43-82),
=302800-6,
=302794.