Show:
1-10
Addition to 20
Subtract within 20
Doubles
Doubles + 1
100

The number before 8

7

100

3 + 5 = 

8

100

15 - 9 =

6

100

6 + 6 = 

12

100

4 + 5 = 

9

200

The number after 3

4
200

6 + 9 = 

15

200

5 - 2 = 

3

200

3 + 3 = 

6

200

2 + 3 = 

5

300

The number after 0

1

300

8 + 2 =

10

300

20 - 7 = 

13

300

5 + 5 = 

10

300

6 + 7 = 

13

400

The number before 10

9

400

7 + 4 = 

11

400

10 - 7 = 

3

400

9 + 9 =

18

400

5 + 6 = 

11

500

The number between 4 and 6

5

500

8 + 12 =

20

500

19 - 5 = 

14

500

7 + 7 = 

14

500

8 + 9 = 

17