6) resolva as expressões: (a) (-2).(-3)? -(-5).(-1)^=​

1)c

2)A

3)B

4)D

5)A

6)(-6)º + (-3)²+ (-2)³ .(-1)

-1+9-8.-1

-1+9+8=16

7)18÷(-3)² -15

18÷9-15

2-15=-13

8)16 + 25 − 56 + (3 ∙ 18): 3 =

16+25-56+(54÷3)

16+25-56+18=3

B) (78 − 54 + 21: 3) ∙ 9

(78-54+7).9=

31.9=279

Explicação

1) (-60 – 340) + (-130 + 70)

-60-340-130+70=-460

2) – 9 + (- 2 ) + 1 é:)

-9-2+1=-10

3)75 – (21 – 8 + 18) – 19 =

75-(31)-19=

75-31-19=25

4)-7 + 14 : (5 – 7)

-7+14÷-2=

-7-7= -14

5)24 :[(14 -6).3] é:

24÷8.3=

3.3=9

6)