8) Calcule :
A) (57 - 12 • 4 ) • ( 12 • 4 - 57 ) • ( 2/3 )
B) ( 1/2 - 0,5 + 85/77 ) : ( 15/14 )
C) ( 90 : 5 ) • ( 4/3 + 5/6 + 7/9 )
9) Calcule :
A) ( 5 • 14 - 60 : 4 ) • ( 4/5 )
B) ( 1/2 + 1/3 + 1/4 ) • (13/14 )
C) ( 123 - 321 ) • ( 0,5 - 5/6 )
Soluções para a tarefa
Respondido por
4
Resposta:
8- A) (57-48).(48-57). 2/3=
(9).(-9).2/3=
(-81).2/3=-162/3 = -54
B) (1/2- 1/2+85/77)/(15/14)=
(85/77)/(15/14)=
(85/77).(14/15)=
(17/11).(2/3)= 34/33
C) (18). (24\18 +15/18 +14/18)=
(18). (53/18)= 53
9- A) (70-15).(4/5)=
55. (4/5) =44
B) (6/12 + 4/12 + 3/12). (13\14)=
(13/12).(13/14)= 169/14
C)(-198).(1/2 - 5/6)=
(-198).(3/6 - 5/6)=
(-198).(-2/6)= 66
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