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= -9000 - 500 + 700
= -9500 + 700
= -8800
2.-4500 : (-30) + 8 * (-300) - 1500
= 150 + (-2400) - 1500
= -2250 - 1500
= -3750
3. 600 + 80 * (-9) + 1800 : 25
= 600 + (-720) + 72
= -120 + 72
= -48
4. 2400 - 6000 : 20 + 40 * (-75)
= 2400 - 300 + (-3000)
= 2100 - 3000
= -900
5 8000 : 50 - 700 * (-9) - 900
= 160 - (-6300) - 900
= 5560
6. -400 * 16 - 900 : (-30) + 1400
= -6400 + 30 + 1400
= -4970
7. 3000 + 1500 : (-50) * 200 * (-7)
= 3000 + (-30) * (-1400)
= 3000 + 42000
= 45000
8. 800 - 900 + 650 * (-8) : 130
= -100 - 5200 : 130
= -100
9. 1800 : (-45) * 35 - 40 * 45
= -40 * 35 - 1800
= -1400 - 1800
= -3200
10. 25 * 90 + 4500 : (-9) + (-16)
= 2250 + (-500) - 16
= 1750 - 16
= 1734
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