Question

Calcule o calor das expressões:

A) 2.(+5) + (+13) =

B) 3.(-3) + 8 =

C) -17 + 5 . (-2) =

D) (-9) . 4 +14 =

E) (-7) . (-5) . -2 =

F) (+4). (-7) -5. (-3) =

G) (-3) . (-6) -2. (-6) =

H) (+3) .(-5) +4. (-6) =

I) -14 + 42

J) 40÷(-2)+9 =

Answer 1

A) 2 x 5 + 13
10+13
=23

B)3.(-3)+8
-9+8
=-1

C)-17+5.(-2)
-17-10
=-27

D)-9.4+14
-36+14
=-22

E)(-7).(-5). -2
-(7.5.2)
-(7.10)
=-70

F)4x(-7)-5x(-3)
-28-5x(-3)
-28+15
=-13

G)(-3).(-6)-2.(-6)
3.6-2x(-6)
3.6+2.6
-6(-3-2)
-6x(-5)
=30

H)3.(-5)+4.(-6)
-15+4.(-6)
-15-24
=-39

I)-14+42
+(42-14)
=28

J)40/(-2)+9
-20+9
=-11