Другие предметы, опубликовано 24.01.2019 18:03
Всем . кароче умоляяюю . 15 а)729 + (–5126) + (–629) + 5126; б) –638 + (–173) + 538 + 173; в) –372 + 984 + 172 + (–2084); г) –78 + 36 + 19 + (–22) + (–25); д) 125 : (–25) + 100 ∙ (–2); e) 745 : (–5) – 42 : (–21); ж) 90 ∙ (–3) : 27 + 12; з) –1200 : (–60) – 64 : (–8).
Ответ оставил: Гость
ответ:
пошаговое объяснение:
а)729 + (–5126) + (–629) + 5126=(5126-5126)+(729-629)=0+100=100
б) –638 + (–173) + 538 + 173=(173-173)+(538-638)=0-100=-100
в) –372 + 984 + 172 + (–2084)=(172-372)+(984-2084)=-200-1100=-1300
г) –78 + 36 + 19 + (–22) + (–25)=-70
-78+36=-42
-42+(-22)=-64
-64+(-25)=-89
-89+19=-70
д) 125 : (–25) + 100 ∙ (–2)=-5+(-50)=-55
e) 745 : (–5) – 42 : (–21)=-149+2=-147
ж) 90 ∙ (–3) : 27 + 12=-270: 27+12=-10+12=2
з) –1200 : (–60) – 64 : (–8)=20+8=28
Ответ оставил: Гость
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