Show:
adding two digit numbers
subtracting two digit numbers
adding 3 digit numbers
subtracting 3 digit numbers
?
100

79+74

 153

100

93-47

46

100

312+253

565

100

826-273

553

100

4975+1675

6650

200

92+86

178

200

84-36

48

200

382+295

677

200

657-194

463

200

4317+4197

8514

300

92+24

116

300

81-39

42

300

438+625

1063

300

497-264

233

300

9474-4675

4799

400

93+95

188

400

92-21

71

400

285+935

1220

400

947-324

623

400

4357-1357

3000

500

73+93

166

500

80-28

52

500

735+214

949

500

987-245

742

500

6795+3167

9962