Question

a) 6+(-7)-(-8)+4-2=b) 16-21+18-8=c) 108+-200+9-42d) 46-{38-(-2)+(-9)+(42-18+(-15)-(-7)}=e) 30:((-12+9)-(3.3-12:3)+2)=f) 45:{-2+12:(-7+3)+12-[(-24):(-3).5+7)]+5}?

Answer 1

a) 6+(-7)-(-8)+4-2=
-1-(-8)+2 = 9
b) 16-21+18-8=
(-15) + 10 = -25
c) 108+(-200)+9-42=
(-92) + (-33) = -125
d) 46- {38-(-2)+(-9)+(42-18+(-15)-(-7)}
46- {40+(-9)+9-(-7)}
46- {31+16}
46-47 = -1
e) 30: (-12+9)-(3.3-12:3)+2
30: (-3)-(9-4)+2
(-10)-5+2 = -13
f) 45:{-2+12:(-7+3)+12-[(-24):(-3).5+7]+5}
45:{-2+12:(-4)+12-[40+7]+5}
45:{-2+(-3)+12-47+5}
45:(-5)+(-35)+5
45:(-35) = -1,28