Ответ:
- \(268+349=268+300+49=568+49=617\).
- \(717+285=717+200+85=917+85=1002\).
- \(846+178=846+100+78=946+78=1024\).
- \(456+278=456+200+78=656+78=734\).
- \(175+698=175+600+98=775+98=873\).
- \(426+378=426+300+78=726+78=804\).
- \(594+286=594+200+86=794+86=880\).
- \(708+196=708+100+96=808+96=904\).
