Rounding, Adding & Subtraction

Rounding to the nearest 10

100

32

30

200

87

90

300

155

160

400

1,262

1,260

Rounding to the nearest 100

100

57

100

200

251

300

300

798

800

400

2,545

2,500

Adding and subtracting 2-digit numbers

100

56+46

102

200

81-27

54

300

99+53

152

400

82-68

14

Adding 3 digit numbers

100

271+299

570

200

339+225

564

300

434+392

826

400

558+344

902

Subtracting 3 digit numbers

100

246-178

68

200

350-218

132

300

517-189

328

400

761-623

138