Chapter 2 – Number Work
Problem Set 2
1. Using the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 write ten each of two-, three-, four- and five-digit numbers. Read the numbers.
Ans:
Two-Digit Numbers:
10 – Ten
24 – Twenty-Four
57 – Fifty-Seven
38 – Thirty-Eight
69 – Sixty-Nine
42 – Forty-Two
85 – Eighty-Five
16 – Sixteen
93 – Ninety-Three
75 – Seventy-Five
Three-Digit Numbers:
123 – One Hundred and Twenty-Three
456 – Four Hundred and Fifty-Six
789 – Seven Hundred and Eighty-Nine
234 – Two Hundred and Thirty-Four
567 – Five Hundred and Sixty-Seven
890 – Eight Hundred and Ninety
345 – Three Hundred and Forty-Five
678 – Six Hundred and Seventy-Eight
901 – Nine Hundred and One
432 – Four Hundred and Thirty-Two
Four-Digit Numbers:
1234 – One Thousand Two Hundred and Thirty-Four
5678 – Five Thousand Six Hundred and Seventy-Eight
9012 – Nine Thousand and Twelve
3456 – Three Thousand Four Hundred and Fifty-Six
7890 – Seven Thousand Eight Hundred and Ninety
2345 – Two Thousand Three Hundred and Forty-Five
6789 – Six Thousand Seven Hundred and Eighty-Nine
0123 – One Thousand Two Hundred and Thirty-Four
4567 – Four Thousand Five Hundred and Sixty-Seven
8901 – Eight Thousand Nine Hundred and One
Five-Digit Numbers:
12345 – Twelve Thousand Three Hundred and Forty-Five
67890 – Sixty-Seven Thousand Eight Hundred and Ninety
23456 – Twenty-Three Thousand Four Hundred and Fifty-Six
78901 – Seventy-Eight Thousand Nine Hundred and One
34567 – Thirty-Four Thousand Five Hundred and Sixty-Seven
89012 – Eighty-Nine Thousand and Twelve
45678 – Forty-Five Thousand Six Hundred and Seventy-Eight
12349 – Twelve Thousand Three Hundred and Forty-Nine
56789 – Fifty-Six Thousand Seven Hundred and Eighty-Nine
90123 – Ninety Thousand One Hundred and Twenty-Three
2. Fill in the blanks in the table below.
Ans:
3. As a part of the ‘Avoid Plastic Project’, Zilla Parishad schools made and provided paper bags to provision stores and green grocers. Read the taluka wise numbers of the bags and write the numbers in words.
Ans:
(1) Twelve thousand seven hundred and forty.
(2) Twenty eight thousand and ninety five.
(3) Thirty one thousand six hundred and eight.
(4) Ten thousand nine hundred and seventy two.
4. How many rupees do they make ?
(1) 20 notes of 1000 rupees, 5 notes of 100 rupees and 14 notes of 10 rupees.
Ans:
20 notes of 1000 rupees = ₹ 20,000
5 notes of 100 rupees = ₹ 100
14 notes of 10 rupees = ₹ 140
20000
+ 140
+ 500
20640
Ans: The above notes make ₹ 20,640 in all.
(2) 15 notes of 1000 rupees, 12 notes of 100 rupees, 8 notes of 10 rupees and 5 coins of 1 rupee.
Ans:
15 notes of 1000 rupees = ₹ 14,000
12 notes of 100 rupees = ₹ 1200
8 notes of 10 rupees = ₹ 80
5 coins of 1 rupee = ₹ 5
14000
+ 1200
+ 80
16285
Ans: The above notes make ₹ 16,285 in all.
5. Write the biggest and the smallest five-digit numbers that can be made using the digits 4, 5, 0, 3, 7 only once.
Ans:
Biggest number – 75,430
Smallest number – 30,457
6. The names of some places and their populations are given below. Use this information to answer the questions that follow.
Tala : 40,642
Gaganbawada : 35,777
Bodhwad : 91,256
Moregaon : 87,012
Bhamragad : 35,950
Velhe : 54,497
Ashti : 76,201
Washi : 92,173
Morwada : 85,890
(1) Which place has the greatest population? What is its population?
Ans: Washi – 92,173
(2) Which place, Morwada or Moregaon, has the greater population?
Ans: Moregaon
(3) Which place has the smallest population? How much is it?
Ans: Gaganbawada – 35,777
Problem Set 3
1. Read the numbers and write them in words.
(1) 7,65,234
Ans: Seven lakh, sixty-five thousand, two hundred and thirty four.
(2) 4,73,225
Ans: Four lakh, seventy-three thousand, two hundred and twenty-five.
(3) 3,27,001
Ans: Three lakh, twenty-seven thousand, and one.
(4) 8,75,375
Ans: Eight lakh, seventy-five thousand, three hundred and seventy-five.
(5) 1,50,437
Ans: One lakh, fifty thousand, four hundred and thirty-seven.
(6) 2,03,174
Ans: Two lakh, three thousand, one hundred and seventy-four.
(7) 6,47,851
Ans: Six lakh, forty-seven thousand, eight hundred and fifty-one.
(8) 9,00,999
Ans: Nine lakh, nine hundred and ninety-nine.
(9) 5,75,010
Ans: Five lakh, seventy-five thousand, and ten.
(10) 4,03,005
Ans: Four lakh, three thousand, and five.
2. Read the numbers and write them in figures.
(1) One lakh thirty-five thousand eight hundred and fifty-five
Ans: 1,35,855
(2) Seven lakh twenty-seven thousand
Ans: 7,27,000
(3) Four lakh twenty-five thousand three hundred
Ans: 4,25,300
(4) Nine lakh nine thousand ninety-nine
Ans: 9,09,099
(5) Seven lakh forty-nine thousand three hundred and sixty-two
Ans: 7,49,362
(6) Eight lakh
Ans: 8,00,000
3. Make five six-digit numbers, each time using any of the digits 0 to 9 only once.
Ans:
(1) 7,64,351
(2) 5,40,293
(3) 3,76,125
(4) 2,49,108
(5) 8,75,641
Problem Set 4
1. Read the numbers and write them in words.
(1) 25,79,899
Ans: Twenty-five lakh, seventy-nine thousand, eight hundred and ninety-nine.
(2) 30,70,506
Ans: Thirty lakh, seventy thousand, five hundred and six.
(3) 45,71,504
Ans: Forty-five lakh, seventy-one thousand, five hundred and four.
(4) 21,09,900
Ans: Twenty-one lakh, nine thousand, and nine hundred.
(5) 43,07,854
Ans: Forty-three lakh, seven thousand, eight hundred and fifty- four.
(6) 50,00,000
Ans: Fifty lakh.
(7) 60,00,010
Ans: Sixty lakh, and ten.
(8) 70,00,100
Ans: Seventy lakh, and one hundred.
(9) 80,01,000
Ans: Eighty lakh, and one thousand.
(10) 90,10,000
Ans: Ninety lakh, and ten thousand.
(11) 91,00,000
Ans: Ninety-one lakh.
(12) 99,99,999
Ans: Ninety-nine lakh, ninety-nine thousand, nine hundred and ninety-nine
2. Given below are the deposits made in the Women’s Co-operative Credit Societies of some districts. Read those figures.
Pune : ₹ 94,29,408
Ans: Rupees Ninety-four lakh, twenty-nine thousand, four hundred and eight.
Nashik : ₹ 61,07,187
Ans: Rupees Sixty-one lakh, seven thousand, one hundred and eighty-seven.
Nagpur : ₹ 46,53,570
Ans: Rupees Forty-six lakh, fifty-three thousand, five hundred and seventy.
Ahmadnagar : ₹ 45,43,159
Ans: Rupees Forty-five lakh, forty-three thousand, one hundred and fifty-nine.
Aurangabad : ₹ 37,01,282
Ans: Rupees Thirty-seven lakh, one thousand, two hundred and eighty-two.
Yavatmal : ₹ 27,72,348
Ans: Rupees Twenty-seven lakh, seventy-two thousand, three hundred and forty-eight.
Sindhudurg : ₹ 58,49,651
Ans: Rupees Fifty-eight lakh, forty-nine thousand, six hundred and fifty-one
Problem Set 5
1. Write the place value of the underlined digit.
(1) 78, 95,210
Ans: 70,00,000 – Seventy lakh
(2) 14, 95,210
Ans: 4,00,000 – Four lakh
(3) 3,52,749
Ans: 50,000 – Fifty thousand
(4) 50,000
Ans: 0 – Zero
(5) 89, 99,988
Ans: 90,000 – Ninety Thousand
2. Write the numbers in their expanded form.
(1) 56, 43, 215
Ans: 50,00,000 + 6,00,000 + 40,000 + 3,000 + 200 + 10 + 5
(2) 70, 815
Ans: 70,000 + 0 + 800 + 10 + 5
(3) 8, 35, 999
Ans: 8,00,000 + 30,000 + 5,000 + 900 + 90 + 9
(4) 8, 88, 889
Ans: 8,00,000 + 80,000 + 8,000 + 800 + 80 + 9
(5) 92, 32, 992
Ans: 90,00,000 + 2,00,000 + 30,000 + 2,000 + 900 + 90 + 2
3. Write the place name and place value of each digit in the following numbers.
(1) 35, 705
Ans:
(2) 7, 82, 899
Ans:
(3) 82, 74, 508
Ans:
4. The expanded form of the number is given. Write the number.
(1) 60,000 + 4,000 + 600 + 70 + 9
Ans: 64,679
(2) 9,00,000 + 20,000 + 7,000 + 800 + 5
Ans: 9,27,805
(3) 20,00,000 + 3,00,000 + 60,000 + 9,000 + 500 + 10 + 7
Ans: 23,69,517
(4) 7,00,000 + 80,000 + 4,000 + 500
Ans: 7,84,500
(5) 80,00,000 + 50,000 + 1,000 + 600 + 9
Ans: 80,51,609
Problem Set 6
1. Write the proper symbol, ‘<’ or ‘>’ in the box.
(1) 5,705 _____ 15,705
Ans: 5,705 < 15,705
(2) 22,74,705 _____ 12,74,705
Ans: 22,74,705 > 12,74,705
(3) 35,33,302 _____ 35,32,302
Ans: 35,33,302 > 35,32,302
(4) 99,999 _____ 9,99,999
Ans: 99,999 < 9,99,999
(5) 4,80,009 _____ 4,90,008
Ans: 4,80,009 < 4,90,008
(6) 35,80,177 _____ 35,88,172
Ans: 35,80,177 < 35,88,172
2. Solve the problems given below.
(1) The Swayamsiddha Savings Group made 3,45,000 papads while the Swabhimani Group made 2,95,000. Which group made more papads?
Ans:
Swayamsiddha Savings Group (3,45,000) > Swabhimani Group (2,95,000)
∴ Swayamsiddha Savings Group made more papads.
(2) Children of the Primary School in Ahmadnagar District collected 2,00,000 seeds while those in Pune District collected 3,25,000. Which children collected more seeds?
Ans: Seeds collected by students in Ahmadnagar district (2,00,000) < Seeds collected by students in Pune district (3,25,000)
∴ Students in Pune district collected more seeds.
(3) The number of people who took part in the Republic Day flag-hoisting ceremony was 2,01,306 in Pandharpur taluka and 1,97,208 in Malshiras taluka. In which taluka did a larger number of people participate?
Ans:
Pandharpur taluka (2,01,306) > Malshiras taluka (1,97,208)
∴ Larger number of people participated in Pandharpur taluka.
(4) At an exhibition, the Annapoorna Savings Group sold goods worth ₹ 5,12,345. The Nirman Group sold goods worth ₹ 4,12,900. This figure was ₹ 4,33,000 for the Srujan Group and ₹ 5,11,937 for the Savitribai Phule group.
Which group had the largest sales ?
Ans: Annapoorna Savings Group had the largest sale.
Which group had the smallest ?
Ans: Nirman Group had the smallest sale.
Write the sales figures in ascending order.
Ans: Ascending order of the sales figure:
74,12,900 > 4,33,000 > 5,11,937 > 5,12,345.