Adding 1 digit and 1 digit
Adding 2 digit and 2 digit
adding 2 digit and 3 digit
adding 3 digit and 3 digit
adding 3 digit and 1 digit
100

1+7

8

100

23+57

80

100

23+100

123

100

635+343

978

100

783+5

788

200

9+3

12

200

26+35

61

200

87+326

413

200

653+758

1,411

200

576+6

582

300

7+4

11

300

89+21

110

300

93+110

203

300

267+357

624

300

876+8

884

400

8+4

12

400

77+44

121

400

53+165

218

400

683+958

1,641

400

267+3

270

500

9+8

17

500

97+45

142

500

96+568

664

500

856+741

1,597

500

354+9

363

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