Resolva:
a) (+3) + (– 2) + (– 5) =
b) (– 2)– (+1)– (+5) =
c) (+4) + (– 2)– (+3) =
d) (+5)– (– 3)– (– 1) =
e) (+4) + (– 6)– (+7)– (– 6) + (+7) =
f) (– 3 )– (– 5 ) + (– 6) + (+8)– (– 4) =
g) + (– 3 + 8)– (– 3 + 8) + (5– 6) =
h) −(−3 − 1) − (−6 + 4 − 1) − 6 − (−3 + 2) =
i) 18 − (−5 − 2 − 3) + 20 − (−6 + 8) − (−1 − 8 + 3) = j) −32 − 1 − (−12 + 14 + 7) + (−5 − 6 − 9 + 3 ) − 17 =
Soluções para a tarefa
Resposta:
a) (+3) + (– 2) + (– 5) =
+3 -2 -5 =
+3 -7 =
-4
b) (– 2)– (+1)– (+5) =
-2 -1 -5 =
-8
c) (+4) + (– 2)– (+3) =
+4 -2 -3 =
+4 -5 =
-1
d) (+5)– (– 3)– (– 1) =
+5 +3 +1 =
+9
e) (+4) + (– 6)– (+7)– (– 6) + (+7) =
+4 -6 -7 +6 +7 = -6 cancela +6
+4 -7 cancela +7
f) (– 3 )– (– 5 ) + (– 6) + (+8)– (– 4) =
-3 +5 -6 +8 +4 =
\ / \ / |
+2 +2 +4 =
+8
g) + (– 3 + 8)– (– 3 + 8) + (5– 6) =
+ 5 - ( +5 ) + ( -1 ) =
+ 5 - 5 -1 = +5 cancela -5
-1
h) −(−3 − 1) − (−6 + 4 − 1) − 6 − (−3 + 2) =
\ / \ / \ /
- ( -4 ) - ( -3 ) -6 - ( -1 ) =
+4 +3 -6 +1 =
\ / \ /
+12 -5 =
+7
i) 18 − (−5 − 2 − 3) + 20 − (−6 + 8) − (−1 − 8 + 3) =
\ / \ / \ /
18 - ( -10 ) + 20 - ( +2 ) - ( -6 ) =
18 +10 +20 -2 +6 =
\ / \ / |
28 +18 +6 =
\ /
+46 +6 =
\ /
+52
j) −32 − 1 − (−12 + 14 + 7) + (−5 − 6 − 9 + 3 ) − 17 =
\ / \ / \ / |
-33 - ( +9 ) + ( -17 ) - 17 =
-33 -9 -17 -17 =
\ / \ /
-42 -34 =
\ /
-76
Explicação passo-a-passo:
Resposta:
a)-4
b)-8
c)-1
d)+9
e) +4
f)+8
g) -1
h)+7
i)+52
j)76
Explicação passo a passo: