Bài 1: a, -(-5) - (+7)+(-3)+(-14)
b, -14+12-17+18
c, -/-13/-/+7/+/-4/+/-5/
d, { -(5-3)-/-7/+/-9/} -(-5)
e, -10+(-15)-(-7)+(-8)
g, - (-15)-(+9) +(-4) +(+5)
f, 3-{ - (-5)+3}-{4-(-7)}
Bài 2: a, -(-15)-(+27)+27+(-15)+(-29)
b, -50+(-14)-(-14)+(-42) - (-50)
c,-/-24/-/27/+(-14)-(-24)+27
d, 12-(4+105-13)+(4+105-13)
e, 32-(-7-28+15)-(7+/-28/+32)
f, -371-[1920+(-371)]
g, (-462-174)-(-462-174)
h,14-/-4/-/15-18/
i, 10-{ 12-[-9+(-1)]}
k,1994+(-252)+(-1894)+(-48)+57
l,-1596+875-424+(-75)-147
n, 1+(-2)+3+(-4)+...+39+(-40)
m, 1-2+3-4+....+199-200
o, 1+3-5-7+9+11-13-15+...+395-397-399
p, 1+2-3-4+5+6-7-8+...+97+98-99-100