Show:
Two-Digit Addition
Two-Digit Subtraction
Perimeter
100

30+10

40

100
23 - 12 _____
11
100

See Slide 1 

10 feet 

200
31 + 27 _____
58
200
44 - 40 _____
4
200

See slide 2 

24 feet

300

36 +54 _____

90

300

92 - 77 _____

15

300

See slide 3

32 feet

400

65 + 25 _____

90

400

73 - 64 _____

9

400

See slide 4

36 feet


500

69 + 11 _____

80

500

73-24

49

500

See slide 5

40