Estimating Differences

Round to the nearest 100, then estimate:
546 −209

• 200
• 340
• 300
• 760

Round to the nearest ten, then estimate:
546 −209

• 340
• 700
• 300
• 350

Round to the nearest 10, then estimate:
57 − 21

• 40
• 30
• 45
• 36

Round to the nearest 10, then estimate:
642 − 137

• 510
• 500
• 780
• 515

Round to the nearest hundred, then estimate:
642 − 137

• 600
• 780
• 500
• 510

Round to the nearest ten, then estimate:
491 − 270

• 220
• 760
• 100
• 210

Round to the nearest 100, then estimate:
491 − 270

• 220
• 800
• 300
• 200

Round to the highest place value.

Estimate the difference:

2 930 - 1928 = ?

Round to the highest place value.

Estimate the difference:

6 385 - 3851 = ?

Round to the highest place value.

Estimate the difference:

9847 - 1383 = ?