Maths

=Marvellous Maths! =


 * August 2011 **

This month in Maths is **'multiplication month** ' - Ibu Diane has created an online times table challenge for everyone in year 5 and 6. We need to practise our tables everyday so that we can memorise the answers and develop strategies for quick computation.

In year 5, the top scorers as of August 6 are: 1st Pop (709pts), 2nd Daniel (259pts), 3rd Nicole (255pts)

In year 6, the leaders are: 1st Komang (194pts), 2nd Krishna (151pts), 3rd Tobi (147pts)

Well done to everyone who has taken on the challenge! Some of you have not joined us in this activity yet so please get online and have some Maths learning fun - you still have 20 days to make it to the top of the leader board. If you don't have internet access at home you can always practise at school.

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 * What are factors and multiples? **

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 * How do I find factors of a number? **

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 * Tips and tricks for finding factors **

Even easier tips and tricks for working out factors!

12**9** is not even **No** || 217 (2+1+7=10, and 10÷3 = 3 1/3) **No** ||
 * Number || Rule || Example ||
 * 2 || The last digit is even (0,2,4,6,8) || 12**8** is even **Yes**
 * 3 || The sum of the digits is divisible by 3 || 381 (3+8+1=12, and 12÷3 = 4) **Yes**
 * 4 || The last 2 digits are divisible by 4

The last 2 digits are 00 || 13**12** is (12÷4=3) **Yes**

70**19** **No** 1**00** **Yes** ||
 * 5 || The last digit is 0 or 5 || 17**5** ends in 5 **Yes**

80**9** doesn't end in 0 or 5 **No** || 308 (it is even, but 3+0+8=11 and 11÷3 = 3 2/3) **No** || (Note: you can apply this rule to that answer again if you want) || 672 (Double 2 is 4, 67-4=63, and 63÷7=9) **Yes** 905 (Double 5 is 10, 90-10=80, and 80÷7=11 3/7) **No** ||
 * 6 || The number is divisible by both //2 and 3// || 114 (it is even, and 1+1+4=6 and 6÷3 = 2) **Yes**
 * 7 || If you double the last digit and subtract it from the rest of the number and the answer is:
 * ** 0 **, or
 * ** divisible by 7 **
 * 8 || The last three digits are divisible by 8

The last 3 digits are 000 || 109**816** (816÷8=102) **Yes** 216**302** (302÷8=37 3/4) **No** ||
 * 9 || The sum of the digits is divisible by 9

(Note: you can apply this rule to that answer again if you want) || 1629 (1+6+2+9=18, and again, 1+8=9) **Yes** 2013 (2+0+1+3=6) **No** ||
 * 10 || The number ends in 0 || 220 **Yes**

22**1** **No** || 3**7**2**9** ((7+9) - (3+2) = **11**) **Yes** 2**5**1**7**6 ((5+7) - (2+1+6) = **3**) **No** || 916 (9+1+6=16, 16÷3= 5 1/3) **No** || Sumdog winners for August Challenge <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 110%;">Yr 5 : 1 st Pop (4970%), 2nd Nicole (4826%), 3rd Gemma (4360%) <span style="font-family: 'Trebuchet MS',Helvetica,sans-serif; font-size: 110%;">Yr 6 1st Krishna (1896%), 2nd Komang (1013%), 3rd Tobi (913 %)
 * 11 || If you sum every second digit and then subtract all other digits and the answer is:
 * ** 0 **, or
 * ** divisible by 11 ** || 1**3**6**4** ((3+4) - (1+6) = 0) **Yes**
 * 12 || The number is divisible by both 3 //and// 4 || 648 (6+4+8=18 and 18÷3=6, also 48÷4=12) **Yes**

<span style="font-family: 'Trebuchet MS',Helvetica,sans-serif;">Log in to Sumdog now to be a winner.
 * Test yourself during September by joining the "Division Duel" **

<span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">How old are you? <span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Have you ever wondered how old you are in days, hours, minutes or seconds? <span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Find out on the Math Cats age calculator

<span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Term 3 <span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Fraction fun <span style="color: #ff0000; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Congratulations to Pop for scoring more than 300 points on Sumdog this week helping her to consolidate her knowledge of fractions. <span style="color: #ff1d00; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Well done to all those who participated and achieved 30 or more correct answers. <span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;">Click on the link below to find out more about fractions. Read the information, use the interactive tools and try the quiz questions.

<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive; font-size: 120%;">[|Fantastic Fractions]