1. Whole Numbers
iGCSE (2021 Edition)
1.01 Estimation
Interactive practice questions
Estimate $99+61$99+61.
a
Round both numbers to the nearest $10$10.
$\editable{}+\editable{}$+
b
Calculate the estimate.
Easy
< 1min
Estimate $63-22$63−22.
Easy
< 1min
Estimate $898-132$898−132.
Easy
< 1min
Estimate $765+171$765+171.
Easy
< 1min
Sign up to access Practice Questions
Get full access to our content with a Mathspace account