Show:
Adding no Regrouping
Subtracting no Regrouping
Adding with regrouping
Subtracting with regrouping
100

12 + 13 =

25

100

10 - 8

2

100

9 + 9

18

100

15 - 6

9
200

15 + 4

19
200

29 - 4

25

200

23 + 8

31

200

30 - 12

18

300

21 + 8 =

29

300

50 -10

40

300

55 + 18

73

300

51 - 23

28

400

49 + 6 =

55

400

98 - 7

91

400

91 + 19

110

400

100 -46

54

500

52 + 8 =

60

500

125 - 15

110

500

214 + 39

253


500

210 - 32

178