___ - 30 = 1970

2000 + ___ = 2090

5000 + ___ = 5400

1000 + ___ = 8000

400 + ___ = 1100

___ + 900 = 920

___ - 60 = 640

8000 + ___ = 8800

1000 + ___ = 1080

2000 - ___ = 1300

70 + ___ = 470

30 + ___ = 830

5000 + ___ = 7000

___ + 6000 = 6300

___ - 400 = 500

1000 + ___ = 7000

___ + 10 = 60

___ + 700 = 1500

300 + ___ = 600

300 - ___ = 200

80 + ___ = 580

9000 - ___ = 2000

700 - ___ = 670

7000 - ___ = 6990

80 + ___ = 1080

2000 - ___ = 1950

___ - 60 = 20

___ + 70 = 8070

___ + 300 = 3300

2000 + ___ = 2800

___ + 800 = 1500

___ - 1000 = 0

4000 + ___ = 4600

___ + 3000 = 3040

100 - ___ = 70

6000 + ___ = 6300

___ + 50 = 100

500 + ___ = 1500

200 + ___ = 800

80 + ___ = 100

300 + ___ = 9300

8000 - ___ = 7600

___ + 50 = 850

___ + 300 = 2300

___ + 400 = 9400

70 + ___ = 9070

200 + ___ = 220

40 + ___ = 140

500 + ___ = 550

___ + 200 = 900

___ + 900 = 1800

200 + ___ = 1000

___ - 700 = 3300

100 + ___ = 400

___ + 100 = 120

___ + 10 = 7010