Show:
Addition w/out regrouping
Addition w/ regrouping
Subtraction w/o regrouping
Subtraction w/ regrouping
Mixed Up!
100
  10

+10

20

100

  23

+ 8

31

100
  11

-10

1

100
  23

-  9

14

100
  31

- 21

10

200
  43

+10

53
200
   34

+58

92

200
  30

-10

20

200
  35

- 16

19

200

  65

- 31

34

300

  34

+12

46

300
  73

+19

92

300

  53

- 10

43

300
  52

- 19

33

300
  34

+62

96

400

  44

+33

77

400

  54

+37

91

400
  67

- 24

43

400
   53

- 39

14

400
  25

+39

64

500
  76

+23

99

500
  85

+37

122

500
  64

- 31

33

500

  75

- 39

36

500
  100

-   53

47