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Addition
Subtraction
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100
3 + 2 = 
5
100

5 - 1 = 

4

100

What number is missing? 

+ 1

1, 2, 3, 4, 5, 6, 7,_, 9, 10

8

200

5 + 3 = 

8

200
6 - 3 = 
3
200

What number is missing? 

+ 2

2, 4, 6, 8, 10,_, 14, 16

12
300

7 + 4 = 

11

300

8 - 3 = 

5

300

What number is missing? 

+ 10, 20,_, 40, 50, 60, 70

30

400

10 + 6 = 

16

400

10 - 8 = 

2
400

What number is missing? 

+ 5 

5, 10, 15, 20, 25, _, 35 

30

500

11 + 14 = 

25

500

18 - 7 = 

11
500

+ 3 

What number is missing? 

3, 6, 9,_, 15, 18

12