What is the rough estimate and closer estimate of 4125 + 139 + 62?

Solution:

The rough estimate is:

• 4125 is rounded off to 4000
• 139 is rounded off to 100
• 62 is rounded off to 50

The final rough estimate is 4160

The closer estimate is:

• 4125 is rounded off to 4120
• 139 is rounded off to 140
• 62 is rounded off to 60

The final rough estimate is 4320

Thus, the rough estimate is 4150 and the closest estimate is 4320.

What is the rough estimate and closer estimate of 4125 + 139 + 62?

Summary:

The rough estimate is 4150 and the closest estimate is 4320.