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10 questions
100 + 200 =
400
200
300
200 - 100 =
210
300
100
300 + 50 =
350
305
300
200 =
100 + 100
100 + 20
150 + 50
500 - 200 =
250
520
300
350 =
400 - 50
300 + 500
300 + 50
100 =
50 + 50 + 0
20 + 50 + 30
40 + 60 + 10
200 + 200 + 100 =
2100
410
500
1000 =
1000 + 40
700 + 300
400 + 600
200 + 100 + 20 =
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