1. -17 × (-11 + (-15))
= -17 × (-26)
= 442
2. (-16 × 5) - (-20 + 30)
= (-80) - (10)
= -90
3. 15 × (-25 - (-21)
= 15 × ( -25 + 21)
= 15 × (-4)
= -60
4. (-17 × (-12)) : (18 + (-22))
= 204 : (-4)
= -51
5. (258 - (-1.197)) : n - (-150) = 441
(258 + 1.197) : n + 150 = 441
1455 : n + 150 = 441
1455 : n = 441 - 150
1455 : n = 291
n = 1455 : 291
n = 5
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1. -17 × (-11 + (-15))
= -17 × (-26)
= 442
2. (-16 × 5) - (-20 + 30)
= (-80) - (10)
= -90
3. 15 × (-25 - (-21)
= 15 × ( -25 + 21)
= 15 × (-4)
= -60
4. (-17 × (-12)) : (18 + (-22))
= 204 : (-4)
= -51
5. (258 - (-1.197)) : n - (-150) = 441
(258 + 1.197) : n + 150 = 441
1455 : n + 150 = 441
1455 : n = 441 - 150
1455 : n = 291
n = 1455 : 291
n = 5