Partial Addition and Subtraction

Partial Sums

100

25 + 58 

83

200

97 + 46

143

300

854 + 563

1,417

400

672 + 423 

1,095

500

8,347 + 1,593

9,940

Column Addition

100

45 + 83 

128

200

93 + 38 

131

300

759 + 327 

1,086

400

7,538 + 1,627

9,165

500

9,572 + 1,823

11,395

Ballpark Estimate

100

32 + 56

30 + 60 = 90 

200

54 + 62 

60 + 60 = 120 

300

453 + 567

500 + 600 = 1,100

400

932 + 271

900 + 300 = 1,200

500

4,621 + 2,291 

5,000 + 2,000 = 9,000

Partial Difference

100

82 - 34

48

200

76 - 58 

18

300

852 - 734

118

400

7,538 - 6,337 

1,191

500

8,573 - 7,317 

1,257

Column Subtraction

100

82 - 48

34

200

248 - 49

199

300

857 - 592

265

400

7,265 - 2,493

4,772

500

8,271 - 4,823

3,448