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Estimate differences
Subtract with regrouping
Subtract without regrouping
Subtract Greater numbers
Subtraction with zeros
100

38-16

20

100

63-19

44

100

430-74

356

100

5829-946

4883

100

2000-755

1245

200

785-68

720

200

74-47

27

200

548-279

269

200

17,246-9,598

7,648

200

4000-891

3109

300

6299-541

5800

300

347-64

283

300

8326-571

7755

300

25,328-8,530

16,798

300

8000-1235

6765

400

87,009-6,552

80,000

400

819-483

336

400

8306-685

7621

400

62,517-8,948

53,569

400

80,000-46,299

33,701

500

918,778-362,045

500,000

500

934-253

681

500

9208-463

8745

500

314,684-279,873

34,811

500

700,000-7,426

692,574