Show:
Addition
Subtraction
Adding a Ten
Subtracting a Ten
100

10+10

20

100

20-20

0
100

37 + 10

47

100

37 - 10

27

200

20+30

50

200

40-30

10

200

41 + 10

51

200

41-10

31

300

40+20

60

300

50-20

30

300

76 + 10

86

300

46 - 10

36

400

50+30

80


400

70-50

20

400

24 + 10

34

400

24 - 10

14

500

60+40

100
500

90-40

50
500

52 + 10

62

500

52 - 10

42