Question

Me ajudem ai por favor

Answer 1

Resposta: 12- A) 64

B) 18

C) 6

D) 104

13- A) 225

B) 500

C) 800

D) 4700

14- A) 50

B) 18

C) 11

D) 3

E) 27

15- A) 24

B) 26

C) 22

D) 43

Explicação passo-a-passo:

12- A) 50+{12+[2-(8-6)+2]}

50+{12+[2-2+2]}

50+{12+2}

50+14=64

B) {[(18-3)+(7+5)-2]+5}-12

{[15+12-2]+5}-12

{25+5}-12

30-12=18

C) 30-{30-[20-(10-1+6)+1]}

30-{30-[20-15+1]}

30-{30-6}

30-24=6

D) 95+{15-[(10-8)+(7-4)-3]-4}

95+{15-[2+3-3]-4}

95+{15-2-4}

95+9=104

13- A) 3×50+3×35

150+75=225

B) 5×97+5×3

485+15=500

C) 4×101+4×99

404+396=800

D) 20×47+80×47

940+3760=4700

14- A) (13+2)×3+5

15×3+5=50

B) (7+2)×(3-1)

9×2=18

C) (4+2×5)-3

(4+10)-3

14-3=11

D) 20-(15+6÷3)

20-17=3

E) 15+[6+(8-4÷2)]

15+[6+6]

15+12=27

15- A) (3+2)×(5-1)+4

5×4+4=24

B) 82-8×7÷(4-1×3)

82-56÷1=26

C) 25-[10-(2×3+1)]

25-[10-7]

25-3=22

D) 70-[12+(5×2-1)+6]

70-[12+9+6]

70-27=43