Show:
Addition within 20
Subtraction within 20
Addition within 20
Subtraction within 20
Just for fun!
100

13+7=

20

100

16-9=

7

100

11+4=

15

100

14-7=

7

100

5+9+8=

22

200

12+4=

16

200

12-8=

4

200

14+5=

19

200

18-5=

13

200

11+4+9

24

300

8+9=

17

300

19-13=

16

300

6+12=

18

300

16-10=

6

300

8+10+7

25

400

6+13=

19

400

15-9=

6

400

7+11=

18

400

19-6=

13

400

12+15+13=

40

500

15+3=

18

500

11-5=

6

500
9+9=

18

500

15-7=

8

500

14+8+19=

41