Grade 3 Maths (IMO) : Number sense

Place value and Face value

Face value of a digit  is the digit itself whereas Place value can be termed as the location of the digit in the numeral.

 

The value of a place in the place value chart is 10 times the value of the place just to its right.

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Grade 3 Maths (IMO) : Multiplication Strategies

A quick look at the grade 2 lesson on introduction to multiplication

Taming the tables – Tips to introduce multiplication

While multiplying always remember :

An even number  x an even number = an even number

An odd number x an even number = an even number

An odd number x an odd number = an odd number

Distributive property of multiplication

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Grade 3 Maths (IMO) : Addition strategies

Listing down some methods to simplyfy addition.

  • Doubles (such as 6 + 6)
  • Near doubles: Try adding a double and the remainder. Solve 7 + 6,  (6 + 6+ 1) or (7 + 7 – 1).
  • Making a ten or a multiple of 10: To add 7 + 6, I can take 3 from the 6 and put it with the 7 to make 10 and 3. This holds good even with multiples of 10 like 20, 30 40, etc
  • 1 more, 1 less: Show problems such as: 8 + 1, 51 + 1, and 6 – 1, 22-1
  • Place value Decomposition: 35 + 22 can be decomposed into tens and ones 30+20 added to 5+2. Or 35 – 22 can be decomposed to 30-20 plus 5-2.

Pictorial representation of the strategies above :

 

 

IMO for grade 2

Have tried breaking the syllabus given by IMO into smaller parts for better understanding.

Syllabus :

Number sense

  • Numerals and number name (3 digits)
  • Comparing Numbers
  • Arranging numbers in ascending or descending order
  • Abacus and Places values
  • Expanded form
  • Even and odd numbers
  • Formation of a number from given digits/information

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Taming the tables – Tips to introduce multiplication

Some tips and tricks to start multiplication which will help you in  knowing  your times tables. I followed this approach with my daughter (she is in grade 1 rt now) and am very happy with the results. She does not have any apprehensions of which table is asked and does a quick mental maths if she does not know the answer.

Tips to approach the concept of multiplication :

I explained these concepts using lego pieces . You can use anything small and handy.

  1. Now that the kids know 2 digit addition the best approach to start multiplication is by asking them to do  repeated addition. Ask them to count the objects in groups of 2 then 3 and so on.
  2. Once they are thorough with repeated addition you can ask them to do skip counting.
  3. Ask them to divide the total number of objects into equal groups.
  4. Arrange the total number of objects in an array of row and column.

Below is a figure to illustrate how multiplication can be introduced to kids.

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Papers : IMO Grade 1

Sample papers for class 1 IMO

imo-ieo-nso-nco

imo-ieo-nso-nco

ieo-nso-imo-nco

imo-ieo-nso-nco

imo_1

imo_2

imo_3

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Logical and analytical reasoning

Reasoning tips and tricks 

Finding the odd one out

Step 1 : Look out for common things

Step 2 : Find a pattern in the similarities

Step 3 : Which one is different and why ? Cross out the similar ones.

Step 4 : Mark the answer .

Example :

oddone2

 What comes next

Step 1 : Look at the changes / similarities between each diagram

Step 2 : Look for a pattern in the changes

Step 3 : Do the different changes one at a time.

Step 4 : Look out for the right option

Example :

what-comes-next-example

 

 

 

 

 

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Geometrical shapes

Geometrical shapes

2dimensional

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Money

Images of indian currency

Coins

25p_coin_india_12

50ps

2re 5re1

10rscoin

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Time

Days of the week

daysofweek

Months in an year

months2

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