Question

Bỏ ngoặc rồi tính:

(-257)-[(-257+156)-56]

 

Answer 1

(-257)-[(-257+156)-56]

=(-257)-(-257+156-56)

=(-257)-(-257+100)

=-257+257-100

=(-257+257)-100

=0-100

=-100

Answer 2

-100 do

Answer 3

 (-257)-[(-257+156)-56]

=(-257)+257+156-56

=[(-257)+257]+(156-56)

=0+100

=100

k cho mk nha b