Estimate or Calculate,
then arrange these statements in order of size

Population of the UK
Number of seconds in a week
A thousand squared
Days since 1st January 1
99 x 99 x 99 x 99

• Tam, Sussex PGCE
•
• This one worked really well and got the pupils thinking! I made one change though, which was to change the number of days question to the days from 1500 AD because it was a bit too close to the number of seconds in a week, (700,000 and 600,000 respectively)
• J Hitchcox, Sheldon
•
• I liked this activity as it made the students think.
Interesting some of the answers. Some students have no real value of size. I did not read the January 1st one correctly. I missed the 1 at the end.
• Mr Keir, WHS
•
• Well done Yr 10 Set 3 at Welshpool High School 2011! Jolly Good Show ALL CORRECT!
• Transum,
•
• Just in case you hadn't noticed, the statements above can be dragged up and down the list when you get to the sorting stage. Dealing with such large numbers is a great opportunity to introduce standard form or scientific notation. Calculators may have presented the answers to the calculations in this format. There is a link to the Transum standard form exercises below.
• Ryder Craig, Linwood Avenue School, Christchurch
•
• The last two are wrong! I calculated the whole thing after I finished it and the second last is in the tens of thousands, though the last is in the hundreds of thousands.

[Transum: Thanks for leaving a comment Ryder. I think you have calculated the number of days since the 1st January in the year 1 incorrectly. Have another go.]

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