Question

Resolva as expressões numéricas: (apresente os cálculos)
a) 18 : 2 – 5 . 6 – 4 =

b) 240 : 3 + 5 – 19 =

c) 270 : 9 – 3 + (11 + 25 . 2) =

d) (640 – 50 . 8) : 6 – 32 =

e) 3 + (16 – 4 . 3) – 6 : 2 =

f) 78 : 2 + (9 . 5) – 33 =

Answer 1

Resposta:

A.

$18 : 2- 5 \times 6 - 4 = 9 -30-4 = 9-34 = 25$

B.

$240 : 3 + 5 - 19 = 80 +5-19 = 85-19= 66$

C.

$270 : 9 - 3 + (11 + 25 \times 2)= \\270 : 9 - 3 + (11 + 50)=\\ 270 : 9 - 3 + 61=\\ 30- 3 + 61=\\ 27 + 61=\\ 88$

D.

$(640 - 50 \times 8) : 6 - 32 = \\(640 - 400) : 6 - 32 =\\240:6 -32=\\40-32=\\8$

E.

$3 + (16 - 4 \times 3) - 6 : 2 =\\3+ (16 -12) -6:2=\\3+4-6:2=\\3+4-3=\\4$

F.

$78 : 2 + (9 \times 5) - 33 = \\78:2 + 45 -33=\\39+45-33 =\\6+45=\\51$

Answer 2

a)18:2=9

-5.6=-30

9-30-4=-25

b)240:3=80

80+5-19=

85-19=

66

c)270:9=30

25.2=50

30-3+(11+50)=

27+61=

88

d)-50.8=-400

(640-400)=240

240÷6=40

40-32=8

e)-4.3=-12

-6:2=-3

3+(16-12)-3=

3+4-3=

7-3=

4

f)78:2=39

9.5=45

39+45-33=

84-33=

51

espero ter ajudado