Math 3rd

add

100

9+9

18

200

16 + 33

49

300

457 + 322

779

add w.regrouping

100

29 + 21

50

200

67 + 49

116

300

789 + 674

1,463

subtract

100

9-5

4

200

27 - 15

12

300

574 - 352

222

subtract w. borrowing

100

22 - 19

3

200

62 - 49

13

300

345 - 276

69