Show:
Adding numbers within 100
Adding three numbers
Subtracting numbers within 100
Subtracting Numbers with 0 in the ones place
100

20+6

26

100

12+2+5

19
100

19-7

12

100

70-5

65

200

25+4

29

200

21+3+6

30
200

26-12

14

200

90- 6

84

300

31+ 8

39

300

31+6+10

47

300

32-11

21

300

100-20

80

400

72+5

77

400

41+3+8

52

400

46-8

38

400

90-40

50

500

82+3

85

500

68+5+2

75

500

54-7

47

500

80-20

60