2942+2756+4172+8599+107143+177182．

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．

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