Question

17 – Calcule o valor das expressões: a) -14+42:3= b) 40:(-2)+9= c) (-12):3+6= d) (-54):(-9)+2= e) 20.(-10).(-5)= f) (-1).(-8)+20= g) 4+6.(-2)= h) 3.(-7)+40 i) (+3).(-2)-25 j) (-4).(-5)+8.(+2)= k) 5:(-5)+9.2= l) 36:(-6)+5.4=

Answer 1

a)-14 + 42 ÷3 = -14 +14= 0
b) 40÷(-2)+9 = -20 + 9 = -11
c) -12÷3+6 = -4 +6= 2
d) (-54):(-9)+2= 6+2 = 8
e) 20.(-10).(-5)= -200 x -5= 1000
f) (-1).(-8)+20= 8 +20 = 28
g) 4+6.(-2)= 4-12 = -8
h) 3.(-7)+40= -21+40 = 19
i) (+3).(-2)-25 = -6-25 = -31
j) (-4).(-5)+8.(+2)= 20+16 = 36
k) 5:(-5)+9.2= -1+18= 17
l) 36:(-6)+5.4= -6+20 = 14