Đáp án:
a) (-1)³ x 7 - (-2)² + 2017 x 0 + 1
= -1 x 7 - 4 + 0 + 1
= -7 - 4 + 0 + 1
= -10
b)25 x (-103) + 25 x 3
= 25 x (-103 + 3)
= 25 x -100
= -2500
c)5/8 x (-12/7) + 5/8 x (-2/7) - 1 3/4
= 5/8 x [(-12/7) + (-2/7)] - 7/4
= 5/8 x -2 - 7/4
= -5/4 - 7/4
= -3
d)25% - 2 1/4 + 2,8 x (-15/14)
= 1/4 - 9/4 - 3
= -2 - 3
= -5
cho mik ctlhn nhé!!!