128+139+142+191= [128+142]+[139+191]=270+330=600
=(128+142)+(139+191)
=270+330
=600
ai k mình mình k lại
128+139+142+191
=(128+142)+(139+191)
=270 + 330
=600
128+139+142+191
=[128+142]+[139+191]
=270 + 330
= 600
128+139+142+191=[128+142]+[139+191]
=270+330=600