Skill you are practising: Estimating sums

We strongly suggest that you do not refresh this page as it resets your progress. Questions will be shown automatically. Your target is to achieve 10 stars to earn the certificate of mastery for this skill.
Score: 0
Practice time:
00:00:00

The sum will be close to:

Oh no! That was incorrect!

Correct answer:

Here is an explanation

First, let's check the question

The sum is close to:

Your incorrect answer is:

Next, let's check the solution.