Instruction to teachers
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Write all possible ways of obtaining a number by adding any two addends
on the cards
For example: The number nine (9) can be obtained by a combination of
different numbers as shown below
1 + 8

2 + 7 
3 + 6

4
+ 5

9 + 0 
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Do this for numbers 1 to 8
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Next, spread all the cards on the table or floor
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Ask the students to find the sum of the numbers on each card
Help them to group the cards having the same sum.
Initiate a discussion by asking questions of the following type (for all
numbers)
i) In how
many ways can you get the number 8?
ii) Which
are they?
Help them conclude that a number can be obtained in many ways.
Extension: If the topic ‘subtraction’ has been completed, you
can add cards which indicate different combinations by which a number can be
expressed (by subtraction)
For example, the number 6 (six)
10 – 4 
9 – 3

8 – 2

7 – 1

6 – 0

