Adding +
Subtracting -
Patterns!
Adding Regrouping
Adding Regrouping
100

2 + 4 =

6

100

5 - 3 =

2

100

Decode the following pattern!

127712771277

ABCCABCCABCC

100

16 + 15 =

31

100

18 + 19 =

37

200

10 + 4 =

14

200

10 - 7 =

3

200

Decode the following Pattern!

909049090490904


ABABCABABC

200

46 + 28 =

74

200

56 + 29 =

85

300

20 + 30 =

50

300

17 - 10 =

7

300

Decode the following Pattern!

283766273466

ABCDEEABCDEE

300

36 + 54 =

65

300

74 + 29

103

400

20 + 40 =

60

400

14 - 7 =

7

400

Decode the following Pattern!


787897878978789

ABABCABABC

400

67 + 34  =

101

400

45 + 29  =

74

500

50 + 40 =

90

500

50 - 20 =

30

500

Decode the following Pattern!

8273482734682734827346

ABCDABCDEABCDABCDE

500

98 + 32  =

130

500

78 + 89  =

167

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