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-9000 - 8000:16 + 700
-9000 - 500 + 700
-1400 +700 = -700
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