Question

1) Calcule as expressões

a) 2 × (+5) +13

b) -17 +5 × (-2)

c)(-7)×(-5)-(-2)

d) (-3)×(-5)+(-2)×(-8)

e)-14+42:3

f)+3 × (-3)+8

g)(-9) × 4 +14

h) (+4)×(-7)+(-5)•(-3)

i) (+3)×(-5)-(+4)×(-6)

j)40:(-2)+9 ​

Answer 1

Resposta:

a) 2×(+5)+13 = 23

b) -17+5×(-2) = -27

c)(-7)×(-5)-(-2) = 37

d) (-3)×(-5)+(-2)×(-8) = 31

e) -14+42:3 = 0

f) +3×(-3)+8 = -1

g) (-9)×4+14 = -22

h) (+4)×(-7)+(-5)x(-3) = -13

i) (+3)×(-5)-(+4)×(-6) = 9

j) 40:(-2)+9 = -11

Explicação passo-a-passo:

a) 2×(+5)+13 = 10+13 = 23

b) -17+5×(-2) = -17-10 = -27

c)(-7)×(-5)-(-2) = 35+2 = 37

d) (-3)×(-5)+(-2)×(-8) = 15+16 = 31

e) -14+42:3 = -14+14 = 0

f) +3×(-3)+8 = -9+8 = -1

g) (-9)×4+14 = -36+14 = -22

h) (+4)×(-7)+(-5)x(-3) = -28+15 = -13

i) (+3)×(-5)-(+4)×(-6) = -15+24 = 9

j) 40:(-2)+9 = -20+9 = -11