Show:
addition to 100
subtraction below 100
3 digit addition w/regrouping
3 digit sub w/regrouping
multiplication up to 20
100

65 + 75

140

100

74 - 42

32

100

456 + 879

1335

100

861 - 289

572

100

10 X 2

20

200

23 + 78

101

200

99 - 71

28

200

742 + 849

1591

200

421 - 199

222

200

3 X 4

12

300

56 + 79

135

300

85 - 42

43

300

499 + 746

1245

300

501 - 399

102

300

5 X 4

20

400

49 + 89

138

400

89 - 74

15

400

999 + 155

1154

400

900 - 423

477

400

3 X 2

6

500

86 + 96

182

500

87 - 42

45

500

469 + 829

1298

500

403 - 189

214

500

4 X 4

16