А) 483+768+517 = (483+517) + 768 = 1000 + 768 = 1768
Б) 164+428+436+272 = (164+436) + (428+272) = 600 + 700 = 1300
В) 371+(246+229) = 371+475 = 846
Г) 634+258+166 = (634+166) + 258 = 800 + 258 = 1058
Д) (5423+10268)+(4577+3732) = 15791 + 8319 = 24110
Е) 41+42+43+44+45+46+47+48+49 = 405
А) 483+768+517 = (483+517) + 768 = 1000 + 768 = 1768
Б) 164+428+436+272 = (164+436) + (428+272) = 600 + 700 = 1300
В) 371+(246+229) = 371+475 = 846
Г) 634+258+166 = (634+166) + 258 = 800 + 258 = 1058
Д) (5423+10268)+(4577+3732) = 15791 + 8319 = 24110
Е) 41+42+43+44+45+46+47+48+49 = 405