CORREÇÃO DAS ATIVIDADES
DO LIVRO DIDÁTICO, PÁGINA: 57
1)
A) – (+ 9)
– 9
|
B) – (– 11)
+ 11
|
C) + (– 13)
– 13
|
D) + (+ 21)
+ 21
|
E) 3 – (– 2)
3 + 2
|
F) – (– 1 + 10)
+ 1 – 10
|
G) 7 + (6 – 3)
7 + 6 – 3
|
H) 1 – (–1 + 5)
1 + 1 – 5
|
I) 9 + (– 4 – 2)
9 – 4 – 2
|
J) – (1 + 4 – 4)
– 1 – 1 + 4
|
+
(– ) = – + (+) = +
–
(+) = – – (–) = +
2)
A) 8 – (–6 + 10)
8 + 6 – 10
+ 14 – 10
+ 4
|
B) – 10 + (6 – 4)
– 10 + 6 – 4
– 4 – 4
– 8
|
C) 2 + (2 + 5 – 7)
2 + 2 + 5 – 7
+ 4 – 2
– 2
|
D) – 5 + (2 – 4) – (7 – 1)
– 5 + 2 – 4 – 7 + 1
– 3 – 11 + 1
– 14 + 1
– 13
|
E) (– 5 + 3) – (5 – 9) + (8
– 1) – 11
– 2 – 5 + 9 + 8 – 1—11
– 7 + 17 – 12
+ 10 – 12
– 2
|
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