ответ: 1) 40+98-49 =98-9=89
2)59-34+14-58 =1-20=-19
3)(68-18)+67-23 =68-18 +67-23=50-23+67=27+67=80+14=94.
Пошаговое объяснение:
40+98-49 = 89
1) 40+98 = 138
2) 138-49 = 89
59-34+14-58 = -19
1) 59-34 = 25
2) 25+14 = 39
3) 39-58 = -19
(68-18)+67-23 = 94
1) 68-18 = 50
2) 50+67 = 117
3) 117-23 = 94
ответ: 1) 40+98-49 =98-9=89
2)59-34+14-58 =1-20=-19
3)(68-18)+67-23 =68-18 +67-23=50-23+67=27+67=80+14=94.
Пошаговое объяснение:
40+98-49 = 89
1) 40+98 = 138
2) 138-49 = 89
59-34+14-58 = -19
1) 59-34 = 25
2) 25+14 = 39
3) 39-58 = -19
(68-18)+67-23 = 94
1) 68-18 = 50
2) 50+67 = 117
3) 117-23 = 94