Number ID
Add to 20
Subtract from 20
Add to 100
Subtract to 100
100

6

six

100

2+3

5

100

2-1

1

100

12+14

26

100

15-10

5

200

9

nine

200

5+5

10

200

6-3

3

200

24+35

59

200

72-2

70

300

14

fourteen

300

5+10

15

300

7-4

3

300

45+30

75

300

45-4

41

400

12

twelve

400

5+6

11

400

13-6

7

400

71+16

77

400

76-22

54

500

21

twenty one

500

9+4

13

500

19-8

11

500

89+11

100

500

100-37

63

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