761
edits
Changes
From Karnataka Open Educational Resources
mLine 87:
Line 87: − *Print 32 squares of this.+ − *Distribute into 8 groups of 4 children each. − *Each group will get 4 squares. − *The value of 4 squares will be 4x100 = 400 − *Each group must cut the solid lines; 1 square will have 10 strips. These are tens. So each square has 10 “tens” (They can either *cut, or work without cutting – up to the children) − *Each one of those tens will have 10 ones. − *Let the children make numbers and write them down − *Ask them what is the largest number each group can make? 400 is the answer – but check if children understand this. − − '''II. Abstraction from here (1 period)'''<br> − Now let us assume children have 9 such squares.<br> − In each group, how many hundreds are possible ? – 9 <br> − In each group, how many tens are there ? – 9 x 10 = 90<br> − In each group, how many tens are there ? – 90 x 10 = 900<br> − − '''1-9 ones are possible; 10 ones means one ten. Ten ones is the same as one ten'''<br> − '''1-9 tens are possible; 10 tens means one hundred. Ten tens is the same as one hundred'''.<br> − '''What happens when we have 10 hundreds? What is it the same as?'''<br> − − '''What is the importance of ten? We count in groups of tens'''<br> − − 9+1= 10 = 10 x 1 <br> − 99 + 1 = 100 = 10 x 10 <br> − 999 + 1 = 1000 = 10 x 100 <br> − '''Greatest 1-digit number + 1 = Smallest 2-digit number''' <br> − '''Greatest 2-digit number + 1 = Smallest 3-digit number''' <br> − '''Greatest 3-digit number + 1 = Smallest 4-digit number''' <br> − '''Following the pattern, we can expect that, on adding 1 to the greatest 4-digit number''' <br> − '''(9999 – nine thousand nine hundred and ninety nine) we get the smallest 5-digit number''' <br> − '''(9999 + 1 = 10,000 or ten thousand). Further we can expect that 10 x 1000 = 10,000 i.e.''' <br> − '''9999 + 1 = 10,000 = 10 x 1000.''' <br> − '''Do this only when children are confident – this is for advanced students'''<br>
→Concept #4 Place Value
[[File:32 squares.png|400px]]
[[File:32 squares.png|400px]]
<br>
'''Write on the board like this:'''<br>
'''Write on the board like this:'''<br>
