Question

3) Efetue as adições abaixo, aplicando a Regra estudada:

a) (–7) + (+3) = f) (+15) + (–9) = k) (+8) + (–21) = p) (+45) + (–18) =

b) (+3) + (–9) = g) (–18) + (+26) = l) (+4) + (–5) = q) (+38) + (–40) =

c) (+4) + (–4) = h) (–23) + (+15) = m) (–34) + (+18) = r) (–63) + (+32) =

d) (+8) + (–11) = i) (+13) + (–7) = n) (–32) + (–42) = s) (+72) + (–33) =

e) (+15) + (–19) = j) (+16) + (–14) = o) (–22) + (+5) = t) (–16) + (–24) =​

Answer 1

Resposta:

a) +4

b) -6

c) 0

d) -3

e) -4

f) +6

g) +8

h) -8

i) +6

j) +2

k) -13

l) -1

m) -16

n) -74

o) -17

p) +27

q) -2

r) -31

s) +39

t) -40

Explicação passo a passo:

a) (–7) + (+3) = +4

b) (+3) + (–9) = -6

c) (+4) + (–4) = 0

d) (+8) + (–11) = -3

e) (+15) + (–19) = -4

f) (+15) + (–9) = +6

g) (–18) + (+26) = +8

h) (–23) + (+15) = -8

i) (+13) + (–7) = +6

j) (+16) + (–14) = +2

k) (+8) + (–21) = -13

l) (+4) + (–5) = -1

m) (–34) + (+18) = -16

n) (–32) + (–42) = -32-42 =  -74

o) (–22) + (+5) = -17

p) (+45) + (–18) = +27

q) (+38) + (–40) = -2

r) (–63) + (+32) = -31

s) (+72) + (–33) = +39

t) (–16) + (–24) =​ -16-24 = -40

Para adição e subtração:

Sinais diferentes subtrai e mantém o sinal do maior número de valor absoluto.

Sinais iguais soma e mantém o sinal.