S.chand composite class 6 Mathematics Chapter 1 Numbers Exercise 1B

EXERCISE 1 B

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QUESTION 1

Read and write down in words , the following numbers in the Indian system of numeration.

(i) 6,80,453

Sol :

Six lakh eighty thousand four hundred eighty three

(ii) 12,36,748

Sol :

Twelve lakh thirty six thousand seven hundred forty eight

(iii) 8,30,09,007

Sol :

Eight crore thirty lakh nine thousand seven

(iv) 10,00,30,004

Sol :

Ten crore thirty thousand four

(v) 33,04,05,078

Sol :

Thirty three crore four lakh five thousand seventy eight

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QUESTION 2

Write the following in figures .

(i) Five lakh three thousand seven hundred eighty-five

Sol :

503785

(ii) Eighty lakh fifteen thousand two hundred f‌ive

Sol :

8015205

(iii) Ninety crore seven lakh nine thousand four hundred three

Sol :

900709403

(iv) One crore one lakh one thousand one

Sol :

10101001

(v) Two hundred seventy crore eighty-eight lakh sixty-f‌ive thousand two hundred ninety-five

Sol :

2708865295

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QUESTION 3

State the place value of 8 in each of the following

(i) 80,657

Sol :

80000

(ii) 8,10,902

Sol :

800000

 

(iii) 86,74,597

Sol :

8000000

 

(iv) 8,16,77,000

Sol :

80000000

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QUESTION 4

Express each of the following numbers in expanded form.

(i) 83,596

Sol :

=80000+3000+500+90+6

(ii) 75,16,930

Sol :

=7000000+500000+10000+6000+900+30+0

(iii) 42,65,93,240

Sol :

=400000000+20000000+6000000+500000+90000+3000+200+40+0

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QUESTION 5

Write the compact numeral.

(i)5×100000 + 7×1000 + 8×100 + 1×10 + 6×1

Sol :

507816

(ii) 7×1000000 + 9×100000 + 0×10000 + 6×100 + 2×10 + 8×1

Sol :

7900628

(iii) 20,00,00,000 + 4,00,00,000 + 70,000 + 600 + 5

Sol :

240070605

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QUESTION 6

Compare , Use < or >  for each 

(i) 19,25,875 __ 19,52,875

Sol :

<

(ii) 60,12,40,627 __ 61,02,04,726

Sol :

<

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QUESTION 7

Arrange the numbers in each of the following from the largest to the smallest.

(i) 6,90,672; 6,09,762; 8,95,072; 9,07,652

Sol :

907652; 895072; 690672; 609762

(ii) 8,93,45,015; 8,45,39,150; 9,01,83,726; 9,00,25,900

Sol :

90183726; 90025900; 89345015; 84539150

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QUESTION 8

Arrange the numbers in each of the following from the smallest to the largest

(i) 4,60,570; 7,90,856; 5,72,803 ; 6,81,906

Sol :

460570; 572803; 681906; 790856

(ii) 64,15,23,453; 2,09,62,000; 11,00,83,000; 9,53,654

Sol :

953654; 20962000; 11008300; 641523453

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QUESTION 9

(i) Write the greatest 8-digit number having three different digits 

Sol :

99999987

(ii) Write the smallest 6-digit number having three different digits

Sol :

100002

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QUESTION 10

How many numbers in all do we have with (i) 7 digits (ii) 9 digits 

Sol :

(i) 9000000

(ii) 900000000

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