a , – 37 + 54 + ( – 70 ) + ( – 163 ) + 246
=[-37+(-163)]+(54+246)+(-70)
=-200+300+(-70)
=30
b , – 359 + 181 + ( – 123 ) + 350 + ( – 172)
=(-359+181)+(-123)+350+(-172)
=-178+(-123)+350+(-172)
=[-178+(-172)]+(-123)+350
=-350+(-123)+350
=(-350+350)+(-123)
=0+(-123)
=-123
c , – 69 + 53 + 46 + ( – 94 ) + ( – 14 ) + 78
=(-94)+(-14)+78+46+53-69
=-108+78+46+53-69
=(-30)+99-69
=(-30)+30
=0
d , 2 . ( – 4 ) . 6 . 25 . ( – 7) . 5
=(2.5).[(-4).25].[6.(-7)]
=10.(-100).(-42)
=42000
e , 42 . 48 – 24 . 34
=42.2.24-24.34
=84.24-24.34
=24.(84-34)
=24.50
=1200
g , 4 . ( – 2)^3 – 7 . ( – 4 )
=4.(-8)-(-7).4
=4.(-8+7)
=4.(-1)
=-4
Chúc bạn học tốt, nhớ vote mik+cảm ơn+ctlhn nhé !