4 + 13 = 17.

This week we spent some time exploring the meaning of the Maths word 'inverse' (the opposite). We were using it to check the accuracy of some calculations by converting addition calculations into subtraction calculations.

4 + 13 = 17 and the inverse is... you guessed it!

We also explored Carroll Diagrams for sorting 2D shapes based on their properties. Here's an example of one we did together. ]]>

e.g. double 34:

34 is partitioned into 30 and 4.

Double 30 is 60

Double 4 is 8

Altogether the total is 68

Double 34 is 68.

Have a look at this website for some more doubling by partitioning practise:

http://www.ictgames.com/woodcards.html

Exploring number sequences, we tried to find patterns and work out a rule that would help us to find the missing numbers.

Ask your child to help you explain this number sequence, find the rule and fill in the missing numbers:

25, 32, ____, 46, ____, 60.

We also took our first

e.g. 256

200 + 50 + 6

two hundred and fifty six.

Building on our understanding of 3-digit numbers we also started to rehearse ordering them from smallest to

We have also started looking different ways to sort 2-digit numbers into groups by counting them in pairs, fives and tens. Working in groups we noted down how many groups of pairs made this number. How many groups of five made this number and also how many groups of ten. Doing this physically with pots of coloured sticks helped us to visualise this grouping activity and begin to formulate mathematical vocabulary relating to multiplication.

]]>We have also started looking different ways to sort 2-digit numbers into groups by counting them in pairs, fives and tens. Working in groups we noted down how many groups of pairs made this number. How many groups of five made this number and also how many groups of ten. Doing this physically with pots of coloured sticks helped us to visualise this grouping activity and begin to formulate mathematical vocabulary relating to multiplication.

e.g. 26 is 13 groups of 2 --------------> 26 = 13 x 2.

Also, on Friday we started our first mental maths challenge in the form of Big Maths Beat That. Everyone took the 30 second challenge to answer as many simple addition facts as they could. Next week we will see who manages to beat the personal score!

http://www.topmarks.co.uk/Flash.aspx?f=DartboardRoundingv2

http://www.aaamath.com/est27ax2.htm

http://mrnussbaum.com/halfcourt/

For our other Maths focus of right angles, here is another website:

http://www.mathsisfun.com/rightangle.html

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http://www.iboard.co.uk/iwb/Estimate-and-Count-Marbles-402

http://www.theproblemsite.com/junior/estimation.asp]]>