(-1975)-(-128-1975)-(128+570)
=-1975-128+1975-(-128)-570
=(1975-1975)+[128+(-128)-570
= 0 + 0 -570
= -570
Bỏ ngoặc ta có : -1975-(-128)-1975-128+570
= -1847-1975-689
=-3822-689
=-4511
\(\left(-1975\right)-\left(-128-1975\right)-\left(128+570\right)\)
\(=-1975+128+1975-128-570\)
\(=\left(-1975+1975\right)+\left(128-128\right)-570\)
\(=-570\)
(-1975) - (-128 - 1975) - (128 + 570).
= -1975 + 128 + 1975 - 128 - 570
= [(-1975) + 1975] + (128 - 128) - 570
= 0 + 0 - 570
= -570.
#Học tốt.