Posted by: cyncas | May 12, 2010

Math concepts for revision

Please find concepts covered in Math to revise.  Next to the ‘tricky’ ones I have put a few examples to help you.  Hope you find them useful.

Numbers: recognition, value and formation 0-100

  • ordering numbers (forward and backward)
  • more and less (bigger and smaller)
  • odd and even
  • double and halving
  • tens and units

Addition: Adding two numbers up to 10 (use of number line or big 

                       number in my mind, small number on fingers)

  • Add two numbers over 10 (big number in mind, small on

                      finger)

  • Add in groups of 2’s, 5’s, 10’s (even when numbers not of these times tables) example: 11, 13,15 (adding in 2’s)

                                                                         1, 11, 21 (adding in 10’s)

  • Add in 10 (using grid – jump down to the next number (jumping whole block which is 10) or change the front digit  by adding 1, then adding the 2nd digit.)
  • Find missing number (use number line and jump from small number to big number, or use fingers and count up from small number till you reach answer available, or starting with big number take away the small number which we already know).
  • Add 3 blocks of numbers (add first set of numbers, put that number in the brain, then continue adding up using fingers or grid)

Take Away: Take away up to 10 (use number line or fingers)

  • Take away from number bigger than 10 (start with small number and count up to the big number, or number line start on big number than jump down to smaller number) in both cases need to count the number of fingers or jumps to get to the smaller number.
  • Take away in 10s (can use grid and jump up to number on top (jumping a whole block which is 10) or change the front digit to one less (since the first digit shows up the tens).
  • Take away with a missing number 1) when missing number is the front one (big number) we need to add the small number we know plus the answer (since in a minus sum we always have the bigger number on the front), when the missing number is the middle one, we need to count up from our answer to the number we already know.

Time: days of the week (name and recognition)

  • months (name and recognition)
  • seasons (name and recognition)
  • clock (o’clock and half past)

Money: recognition of coins

  • value and adding values
  • shopping (adding up values)
  • change (count up from what was spent to tthe money available)

Position and direction: left and right

  • up and down and move towards right or left
  • turn half way and quarter way and full way

Measurement: by span

  • by cubes
  • by ruler (cm)
  • by meter

Capacity: estimation

  • full, empty, almost full, almost empty
  • litre
  • more than /less than a litre

Weight: estimation

  • heavy/light
  • heavier/lighter/ the same
  • by cubes

Sorting objects: using diagrams

  • using tables
  • using lists
  • using graphs
  • using 1st (first) 2nd (second) etc… 

Problem solving and story sums: (need to listen/read problem carefully and understand what is being asked).

As you can see in some cases there is more than one way to work out the sum.  As long as the children understand the concept and come to the right conclusion, there is not correct or incorrect way of working things out.


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