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___ + 600 = 800
___ + 500 = 8500
300 + ___ = 4300
___ - 60 = 540
900 + ___ = 1200
1000 + ___ = 1600
2000 + ___ = 8000
___ + 200 = 900
___ - 90 = 5910
___ - 90 = 2910
___ + 900 = 2900
70 + ___ = 90
___ + 900 = 1800
___ + 40 = 9040
___ + 700 = 750
90 + ___ = 9090
___ + 30 = 40
40 + ___ = 540
700 + ___ = 790
700 + ___ = 720
___ - 60 = 4940
___ - 400 = 600
300 + ___ = 600
___ + 80 = 7080
___ - 600 = 8400
2000 - ___ = 1950
100 + ___ = 600
500 - ___ = 440
___ + 900 = 920
___ - 400 = 400
___ - 20 = 880
___ + 30 = 100
20 + ___ = 520
___ + 7000 = 10000
___ + 80 = 380
___ + 20 = 80
1000 - ___ = 990
10 + ___ = 410
___ - 60 = 640
___ - 30 = 370
___ - 600 = 0
70 + ___ = 870
___ + 500 = 570
___ + 50 = 250
___ - 200 = 500
___ + 1000 = 1060
___ + 5000 = 10000
___ + 70 = 370
4000 + ___ = 4080
300 + ___ = 700
___ - 6000 = 1000
30 + ___ = 630
2000 + ___ = 9000
___ + 700 = 2700
___ + 2000 = 2400
___ - 30 = 770