Show:
Subtraction
Subtraction with Estimating
Addition and Subtraction
Addition with Estimating
Addition
100

426 - 265

161

100

Estimate:

728 - 174

700 - 200 = 500

100

Fill in the blank: 

471 + ___ + 133 = 932

328

100

Estimate:

214 + 67

200 + 70 = 270

100

788 + 21

809

200

444 - 210

234

200

Estimate:

556 - 45

600 - 50 = 550

200

Fill in the blank:

987 - ___ = 174

813

200

761 + 87

800 + 90 = 890

200

870 + 108

978

300

712 - 398

314

300

Estimate:

1,253 - 789

1,000 - 800 = 200

300

Fill in the blank:

713 + ___ = 740

27

300

861 + 861

900 + 900 = 1,800

300

527 + 138 + 94

759

400

73,826 - 1,508

72,318

400

Estimate: 

87,683 - 34,201

90,000 - 30,000 = 60,000

400

Fill in the blank:

15,620 - ___ - 24 = 10,393

5,203

400

Estimate:

254 + 421

300 + 400 = 700

400

683 + 231 + 735

1649

500

89,156 - 58,429

30,727

500

Estimate: 

45,293 - 4,201 - 592

50,000 - 4,000 - 600 = 45,400

500

Fill in the blank:

868 - ___ = 201

667

500

Estimate: 

36,821 + 2,386 + 54

40,000 + 2,000 + 50 = 42,050

500

436 + 372 + 185 + 79

1,072