Show:
Adding Tens
Subtracting Tens
Addition and Subtraction
Missing Numbers
100

10+30

 40

100

40-20

 20

100

33+11

44

100

____+59=89

 30

200

34+30

64

200

53-20

 33

200

58+26

 84

200

44+____=87

43

300

56+20

 76

300

87-70

 17

300

73-67

 6

300

____-51=32

 83