ADIÇÃO
a- (+3) + (–18) =
b- (–9) + (–7) =
c- (–16) + (+5) =
d- (+8) + (–10) =
e- (+4) + (+19) =
f- (+13) + (–1) =
g- (–6) + (–17) =
h- (+37) + (–37) =
i- (+18) + (–18) =
j- (+17) + (–18) =
k- (–46) + (+16) =
l- (+50) + (–32) =
m- (–15) + (–15) =
n- (+7) + (+7) =
o- (–14) + (+14) =
SUBTRAÇÃO
a- (+7) – (–12) =
b- (–3) – (–7) =
c- (–23) – (+6) =
d- (+10) – (–10) =
e- (–4) – (+9) =
f- (+1) – (–1) =
g- (–17) – (–17) =
h- (+3) – (–17) =
i- (+12) – (+8) =
j- (+27) – (+9) =
k- (–32) – (+16) =
l- (+16) – (–2) =
m- (–72) – (–72) =
n- (+14) – (+14) =
o- (–10) – (+10) =
MULTIPLICAÇÃO
a- (+6) . (–8) =
b- (–7) . (–9) =
c- (–16) . (+5) =
d- (+18) . (–10) =
e- (+13) . (+3) =
f- (+19) . (–1) =
g- (–20) . (–7) =
h- (+5) . (–7) =
i- (+13) . (–13) =
j- (+7) . (–18) =
k- (–6) . (+16) =
l- (+5) . (–45) =
m- (–15) . (–15) =
n- (+28) . (+3) =
o- (–4) . (+74) =
DIVISÃO
a- (–18) : (–3) =
b- (+56) : (–7) =
c- (+16) : (+2) =
d- (+80) : (–4) =
e- (+45) : (–9) =
f- (+13) : (–1) =
g- (–63) : (+7) =
h- (–32) : (–4)=
i- (+18) : (–9) =
j- (–72) : (–8) =
k- (+48) : (+8) =
l- (+54) : (–9) =
m- (–32) : (–16) =
n- (–28) : (+7) =
o- (–196) : (+14)
Soluções para a tarefa
Lembre-se da regra dos sinais:
+ com + = +
- com - = +
- com + = -
ADIÇÃO
a- (+3) + (–18) = -15
+3 - 18 = -15
b- (–9) + (–7) =
-9 - 7 = -16
c- (–16) + (+5) =
-16 + 5 = -11
d- (+8) + (–10) =
+8 - 10
-2
e- (+4) + (+19) =
+4 + 19
+23
f- (+13) + (–1) =
+13 - 1
+12
g- (–6) + (–17) =
-6 - 17
-23
h- (+37) + (–37) =
+37 - 37
0
i- (+18) + (–18) =
+18 - 18
0
j- (+17) + (–18) =
+17 - 18
-1
k- (–46) + (+16) =
-46 + 16
-30
l- (+50) + (–32) =
+50 - 32
+18
m- (–15) + (–15) =
-15 - 15
-30
n- (+7) + (+7) =
+7 + 7
+14
o- (–14) + (+14) =
-14 + 14
0
SUBTRAÇÃO
a- (+7) – (–12) =
+7 + 12
+19
b- (–3) – (–7) =
-3 + 7
+4
c- (–23) – (+6) =
-23 - 6
-29
d- (+10) – (–10) =
+10 + 10
+20
e- (–4) – (+9) =
-4 - 9
-13
f- (+1) – (–1) =
+1 + 1
+2
g- (–17) – (–17) =
-17 + 17
0
h- (+3) – (–17) =
+3 + 17
+20
i- (+12) – (+8) =
+12 - 8
+4
j- (+27) – (+9) =
+27 - 9
+18
k- (–32) – (+16) =
-32 - 16
-48
l- (+16) – (–2) =
+16 + 2
+18
m- (–72) – (–72) =
-72 + 72
0
n- (+14) – (+14) =
+14 - 14
0
o- (–10) – (+10) =
-10 - 10
-20
MULTIPLICAÇÃO
a- (+6) . (–8) = -48
b- (–7) . (–9) = +63
c- (–16) . (+5) = -80
d- (+18) . (–10) = -180
e- (+13) . (+3) = +39
f- (+19) . (–1) = -19
g- (–20) . (–7) = +140
h- (+5) . (–7) = -35
i- (+13) . (–13) = -169
j- (+7) . (–18) = -126
k- (–6) . (+16) = -96
l- (+5) . (–45) = -225
m- (–15) . (–15) = +225
n- (+28) . (+3) = +84
o- (–4) . (+74) = -296
DIVISÃO
a- (–18) : (–3) = +6
b- (+56) : (–7) = -8
c- (+16) : (+2) = +8
d- (+80) : (–4) = -20
e- (+45) : (–9) = -5
f- (+13) : (–1) = -13
g- (–63) : (+7) = -9
h- (–32) : (–4)= +8
i- (+18) : (–9) = -2
j- (–72) : (–8) = +9
k- (+48) : (+8) = +6
l- (+54) : (–9) = -6
m- (–32) : (–16) = +2
n- (–28) : (+7) = -4
o- (–196) : (+14) = -14