NUMBER CARD TRICKS 1.What is the biggest number you can make using these cards?⬜ 2.) What is biggest odd number you can make using these number cards ?⬜
3.) What is the smallest even number you can make by rearranging these cards?⬜
4.) What is the smallest you can make using these number cards?⬜
5.) What is the biggest even number you can make these number cards?⬜
6.) Subtract 200 from the biggest even number using these cards?⬜
INTRODUCTION 5- AND 6- NUMBERS
Till now you have learnt up to 4-digit numbers. We will learn about 5- and 6- digit numbers.
5- digit numbers
you know that
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9+1
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Greatest 1-digit +1= smallest 2-digit number
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99+1
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Greatest 2-digit +1= smallest 3-digit number
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999+1
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Greatest 3-digit +1= smallest 4-digit number
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Following the above pattern, can you tell what number you will get if you add 1 the greatest 4- digit number?
We have, 9999+1 =10000
10000 read as ' Ten Thousand'
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10 Thousand =
1 ten thousand ➝ 10000
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Let us see some example on Abacus
6 3 7 4 2
4 3 6 2 7
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10000 is ten thousand = ten thousand
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20000 is ten thousand = twenty thousand
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30000 is ten thousand = thirty thousand
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40000 is ten thousand = forty thousand
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50000 is ten thousand = fifty thousand
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60000 is ten thousand = sixty thousand
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70000 is ten thousand = seventy thousand
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80000 is ten thousand= eighty thousand
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90000 is ten thousand = ninety thousand
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Forming 5- digit numbers
On adding 1 to the smallest 5- digit number, 10000, we get 10000+1 =10002 (Ten thousand two),.....,99998 + 1= 99999 (ninety- nine thousand nine hundred ninety - nine),...,
99999 is the greatest 5- digit number.
if we add 1 to this number, we get 99999+1=100000
100000 is read as 100 thousands or 1 lakh . this number has 6 digit. it is smallest 6-digit number.
Periods:-
A number is split into groups called periods.
For a 5-digit number, the first three places from the right make the ones period and the next two make the thousand periods. We separate the periods using commas or leave a short space.
THUS, the number 16842 can be written as 16,842 or 16 842.
💭 Ones period :-- Ones, Tens, Hundreds.
💭Thousands period:-- Thousands, Ten Thousand.
While reading a numeral, all the digits in the same period are read together and the name of period (except the ones) is read with the digits.
T
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Thousand period
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Ones period
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Ten thousand
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Thousand
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Hundreds
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Tens
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Ones
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6
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5
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9
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7
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6
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We have 65,976= sixty -five thousand nine hundred seventy six.
6- Digit Numbers:-
To write the smallest 6- digit number , 1 lakh or 100000 using commas, we proceed as under:-
starting from the right , we put a commas after three digits and then another comma after the fifth digit.
1,00,000
Step 1:- put a comma after 3 digits from the right.
Step 2:- Then put a comma after the fifth digit.
We represent the smallest 6- digit number in the place value chart as shown below:-
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Lakhs
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Thousand
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Ones
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Hundred
thousands
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Ten Thousands
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Thousands
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Hundreds
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Tens
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Ones
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1
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0
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0
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0
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0
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0
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1 is in the hundred
thousands place or lakhs place. So,
1,00,000 is read as 1Lakh.
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Counting in Lakhs
Forming 6- digit Number :-
Like 5- digit number, 6- digit number can also be formed by adding 1 to the number. For Example 100000+1 =100001(One lakh one ), 100000+1 =100002 (One lakh two),.....,999998 + 1= 999999 (Nine lakh ninety-nine thousand nine hundred ninety - nine),...,999999 is the greatest 6- digit number.
PERIODS:-
In a 6-digit number, the first three places from the right make the ones period, the next two makes the thousand period and the next, that is , the sixth place, makes the lakh period. we may put the comma between different periods or leave the space between them .
6 6 5 4 3 2
Thus it can be written as,
6,65, 432 or 6 65 432
We read it as 'Six lakh sixty- five thousand four hundred thirty two'
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