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- Tiaana's Page
Thursday, 5 December 2013
The Power of Two - Prize winners
Citizenship Award - Jesse Hickmott
Year 7 Arts and Performing Arts - Jude Van Houtte
Excellence - Ben Baas and Jesse Hickmott
Achievement - Serena Matson and James Waterson
Supreme attitude: Keely Puklowski
Student of the Year: Jude Van Houtte
and then.... Serena's seat was called for the lucky draw!
Tuesday, 3 December 2013
During our morning maths hotspot we had to answer 20 mathematical questions from a range of strands, as well as numeracy.
One of the questions was about Roman Numerals. We had to write 475 using roman numerals.
Monique and Tiaana came up with two different answers:
Do you which one is correct?
We were a little confused, but with a bit of research we came across this website that helped explain when to use the subtracting rule.
Purple Math - Roman Numerals
The next number is 4, which is 1 + 1 + 1 + 1, but using four I's for "4" isn't allowed (because we can't do four of the same numeral in a row). If we were dealing with money, we could pay four dollars with four singles (which is 1 + 1 + 1 + 1 = 4) or we could pay with a five and get a single in change (which is 5 – 1 = 4). In Roman numerals, we "subtract" the 1 from the 5 by putting an I in front of a V: IV is "four" in the sense of "one, from five, leaves four".
- IV = (5 – 1) = 4
So we now know that the correct answer is: CDLXXV
Can you give us some reasons for learning about roman numerals?