Show:
Vertical method
Place Value Disks
Arrow or number bond Method
Subtraction
100

32 

+

24

56

100

12 + 25

37

100

14 + 31

45

100

54 - 12

42

200

19

+

41

60

200

44 + 38

82

200

43 + 22

65

200

64 - 50

14

300

57 

+ 

28

85

300

34 + 43

77

300

43 + 37

80

300

34 - 27

7

400

15 

+

68

83

400

49 + 43

92

400

55 + 55

110
400

81 - 56

25

500

What's wrong with my problem?

Show slide 1.

500

What's wrong with my problem?

Slide 2

500

What's wrong?

Slide 3

500

What's wrong?

Slide 4