Question

b) –15 + [(-12) – 4] – (-7 – 4)
c) 45 – {51 + [(-3) – (+8)]}
d) (4 - 8) - {[7 + (2 - 4) – (-5 - 13)] – 1}​

Answer 1

b)-15+[-12-4]+11

-15+[-8+11]

-15+3=-12

c)45-{51+[11]}

45-{51+11}

45-{62}

45-62=-17

d)-8-{[7+(-2)-(-18)]-1}

-8-{[7+(-16)]-1}

-8-{[7-16]-1}

-8-{[9-1]}

-8-{8}

-8-8=-16