Thursday, December 3, 2009

Josef's Scribepost for December 3

Today in Math, we talk about square root in the foldables and our textbook.We need to answer questions : 6,9,11,13,15,17,19,20,21,22 and 25.

11)What is the square of each number?
a)9
-The square is 81. Because you multiply it by itself.9 squared or 9x9=81

b)11
-The square is 121. Because you multiply it by itself.11 squared or 11x11=121

17)A fridge magnet has an area of 54mm squared. Is 54 a perfect square? Use prime factorization to find the answer?

54
/ \
2 27
/ / \
2 3 9
/ / / \
2 x 3 x 3 x 3

54=2x3x3x3,54 is not a perfect square because it has an odd number of factor of 2 and 3

4 comments:

Eric.P 8-73 December 3, 2009 at 8:15 PM  

Good scribe Josef but next time try to explain how you got the answer.

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