Show:
Adding with 10
Adding Doubles
Mixed Addition
Mixed Subtraction
Subtraction with 10
100

10+4

14

100

4+4

8

100

12+4

16

100

10-2

8

100

17-10

7

200

10+9

19

200

6+6

12

200

17+6

23

200

12-7

5

200

21-10

11

300

13+10

23

300

12+12

24

300

21+9

30

300

9-9

0

300

15-10

5
400

10+23

33
400

5+5

10

400

22+13

35

400

23-5

18

400

22-10

12

500

17+10

27

500

9+9

18

500

17+19

36

500

17-3

14

500

42-10

32