Question

calcule [(+4)-(+3)]-{+(-7)+[(-3)-(-2)+(3-4)]}

Answer 1

[(+4)-(+3)]-{+(-7)+[(-3)-(-2)+(3-4)]}
= [(+4)-(+3)] - {+(-7) + [(-3) - (-2) + (3-4)]}
= [4 - 3] - {-7 + [ (-3) - (-2) + (-1)]}
= 1 - { -7 + [ -3 + 2 - 1]}
= 1 - { -7 + [-2]}
= 1 - { - 7 -2}
= 1 - {-9}
= 1 + 9
= 10

bons estudos!!