Maths Std IV Chapter 7

7. Factors

1. Write properties of
(a) factors  (b) prime numbers   (c) composite number   (d) multiples

2. Fill in the blanks.
(a) The smallest prime number is ________.
(b) A prime number cannot be divided exactly by any other number other than _______
     and itself.
(c) The only even prime number is _______.
(d) ______ and ______ are neither prime nor compostie numbers.
(e) Factorization means writing a number as a ______________ of its factors.
(f) We can write every composite number as a product of factors that are
    ____________ numbers. This is called _____________ factorization.
(g) The biggest factor that is common to all given numbers is called
    ___________________ of the given numbers.
(h) Multiple of a number = __________ x any counting number
(i) The smallest multiple that is common to all given numbers is called the ____________
     of the given numbers.

3. Write two methods of factorization for obtaining prime factors.

4. Write down the factors of the following numbers
    (a) 48    (b) 90

5. Make a factor tree for the following numbers.
    (a) 96    (b) 40

6. Find the common factors of the following numbers.
    (a) 6 and 18      (b) 20, 35 and 60

7. Write the first 100 prime numbers.

8. Write 'true' or 'false'.
    (a) The smallest prime number is 1
    (b) 87 is a prime number
    (c) The smallest factor of every number is 1.

9. Express the following composite numbers as a product of their prime factors.
    Use division method.
    (a) 124   (b) 275

10. Write the difference between multiples and factors.

11. Write the multiples as directed.
(a) First four multiples of 7 _______________.
(b) Fifth multiple of 8 _________________.
(c) Eleventh multiple of 6 _______________.

12. Circle those which are not the multiples of the numbers given in words.
(a) four              8      12      14     16     18     20      22
(b) twelve         26     36       48    17     94     108    121

13. Skip count to complete the following sequence
(a) multiples of 5                   25, 30, 35, _____, _____, _____, _____
(b) multiple of 8                     40, 48, 56, _____, _____, _____, _____
(c) multiples of 13                 26, 39, 52, _____, _____, _____, _____,

14. Find two common multiples of the following numbers.
(a) 5,7        (b) 3, 6, 9

15. Which of the following numbers are divisible by 2?
      (a) 83    (b) 132     (c) 443

16. Which of the following numbers are divisible by 3?
      (a) 317    (b) 442       (c) 906

17. Which of the following numbers are divisible by 5?
      (a) 160    (b) 384    (c) 295

18. Which of the following numbers is divisible by 10?
      (a) 100     (b) 209     (c) 780

19. Find three common multiples of the following numbers.
      (a) 3, 4 and 6      (b) 10, 15 and 20

20. Write first 6 multiples of the following numbers.
      (a) 11    (b) 12

21. Complete the following sequence.
      (a) 18, 22,26, 30, _____, _____, _____,
      (b) 15, 20, _____, _____, _____, 40, _____,

22. Find the following factors.
      (a) Factors of 15 = __________________
           Factors of 36 = __________________
           Common factors of 15 and 36 = __________________

23. Is 246 a multiple of 8?

24. Which of these numbers 84, 215, 306, 825 are divisible by the given numbers?
      (a) 2      (b) 3     (c) 5    (d) 10

25. Express (a) 90    (b) 117 as the product of their prime factors.

26. Write the first five even multiples of 4.

27. Write the first five odd multiples of 11. 

Maths Std IV Chapter 6

6. Division

1. Divide and check your answer.
(a) 2048 by 9   (b) 9023 by 4   (c) 8174 by 31  (d) 9898 by 38

2. Divide using both long and short division method.
(a) 6,873 ÷ 9   (b) 5,486 ÷ 13

3. Divide using cancellation method.
(a) 6,39,000 ÷ 8,000   (b) 7,080 ÷  50

4. Find estimated and actual quotient and remainder of the following. Round off the
    numbers to the nearest 10
(a) 219 ÷ 27   (b) 9,321 ÷ 56

5. Word problems.
(a) Sameer purchased 28 key chains and distributed them equally among 11 friends
     Estimate how many key chains did each friend get.
(b) A baker bakes 876 cookies in a day. He packs them in boxes each of which can
     have 45 cookies. How many boxes will be needed to pack all the cookies?
(c) Frame a word problem for 416 ÷ 13 = ?
(d) A man earns ₹ 12,000 in 10 day. How much will he earn in 18 days?
(e) For school sports day, ₹ 30,000 was collected from 200 students. How much money
     did each student give? If there are 350 students in the school, how much money is
     yet to be collected?

6. Simplify
(a) 3,600 ÷ 90 x 9 + 5 x 24 -120 ÷ 6
(b) 128 ÷ 16 x 5 + 320 x 4 -150 + 280

Maths Std. IV Chapter 5

5. Multiplication

1. Complete the table.

2. Write the properties of multiplication with suitable examples.

3. Circle the correct answer.
(a) 231 x 100 = 2,300;    2,31,000;     23,100;   23,010
(b) 926 x 1,000 = 92,600;   9,26,000;   9,260;    9,20,600

4. Fill in the blanks.
(a) 82 x 3000    (b) 364 x 800

5. Find the product.
(a) 5,203 x 7   (b) 9,806 x 2

6. Multiply using the expanded form and verify the result by actual  multiplication.
(a) 6,153 x 8   (b) 2,956 x 3

7. Find the product.
(a) 149 x 39    (b) 92 x 38   (c) 9,922 x 76   (d) 68 x 137   (e) 8,973 x 602

8. Estimate the product by rounding off to the nearest 10.
(a) 76 x 52   (b) 108 x 175

9. Estimate the product by rounding off to the nearest 100.
(a) 472 x 594   (b) 8,792 x 361

10. Observe the following pattern and complete it.
      1 x 9 + 2                           = 11
      12 x 9 + 3                         = 111
      123 x 9 + 4                       = 1111
      1234 x 9 + ____               = _____________
      123456 x 9 + ____           = _____________
      1234567 x 9 + ____         = _____________

      12345678 x 9 + ____       = _____________

11. Use the simple tricks to find the products.

(a) 8 x 10   (b) 13 x 15   (c) 23 x 25

12. Multiply 526 and 4,615 by 11 using addition.

13. Word problems.

(a) A pet store has 15 tanks of fish. If each tank has 46 fish, how many fish

     does the pet store have?

(b) A company has 1,563 staff workers. There are 80 company vans. If 8 staff

     workers come in each van, how many people come by other means of transport?
(c) A travel agency sold 18 holiday packages for Malaysia and 16 holiday packages
     for Australia. If one holiday package for Malaysia costs Rs. 27,985 and Australia
     Rs. 49,869, how much did the agency earn from the two holiday packages?

(d) Frame two word problems for 3,432 x 6.

14. Simplify 20 x 6 - 16 x 2 + 4 x 5

15. Solve by lattice multiplication.

(a) 145 x 415   (b) 345 x 15

16. Multiply using both lattice and column methods.

(a) 211 x 16   (b) 639 x 705

17. Choose the best estimate and tick the correct answer.
(a) A jewellery company ordered 82 boxes of silver beads. There were 77 beads in each
     box. About how many silver beads did the jewellery company order?
     ____ 64,000                ____ 6,300
(b) A grocery store sold 8 coupons to each house in their locality. There are 639 houses
     in the locality. About how many coupons did the grocery shop distribute in all?
    _____ 5,100                 ____ 5,200

Maths Std IV Chapter 4

4.Subtraction

1.Solve and identify the minuend, subtrahend and difference.
   Write in the given table.
(a) 67,814 - 31,210    (b) 5,63,220 - 4,10,364

2.Subtract the numbers
a.

b.

3. Change to numbers and solve. Write the answer in words.
(a) Fifty-seven thousand seven hundred ninety-three minus Thirty-three thousand three
     hundred fifty-one.
(b) Four lakhs fifty-nine thousand three hundred four minus One lakh twenty-four thousand
     one hundred one.

4. Subtract the following numbers.
(a) 

(b)

5. Find the following differences.
(a) 64,013 - 36,795     (b) 2,79,004 - 97,864

6. Solve the following Input/Output problems.
(a) Subtract 10

(b) Subtract 1000

7. Which of the two is correct? Give reasons.

8. Subtract and check your answer.
(a)

(b) 

9. Find the following differences and check your answers.
(a) 78,036 - 49,157    (b) 5,08.906 - 9,984

10.Find the missing digits.
(a) 

(b)

11. Solve the following estimation.
(a) 47,213 - 23,106 (round off to nearest 100)
(b) 4,21,023 - 2,34,475 (round off to nearest 1000)

12. The sum of two numbers is 3,54,370. If one number is 1,82,756, what is the other
      number?

13. What number is 36,851 less than 87,625? (Hint: Here the subrahend and minuend
      are given.)

14. Frame one word problem for each of the following. Then solve to find the answer.
      (a) 17,345 - 12,598    (b) 1,50,720 - 82,625

16. Solve the following sums.
      (a) 75,364 + 82,915 - 47,698 - 20,521
      (b)1,23,548 - 36,249 - 513

17. Find the difference between 6,37,248 and 4,92,731 using the estimation method by
      rounding off to the nearest 1,000. Compare the actual value and the estimated
      value.

MATHS Std. IV Chapter 3

3. Addition

1. Add the following numbers.
(a) 26,182 and 37,405    (b) 86,736 and 8,01,342

2. Write the addends and the sum obtained.
(a) 4,00,912 + 3,46,238     (b) 6,11,430 + 2,20,406

3. Add and write the answer in words.
(a) Thirty-five thousand four hundred eighteen and sixty-two thousand three hundred
      and ninety.
(b) Three lakh forty-six thousand seven hundred forty-two and two lakh sixty-six thousand
      four hundred fifty-two.

4. Tick the number in the inner circle which is the sum of the numbers given in the
     outer circle

5. Find the sum
(a)

 (b)

6. Find the missing digits.
(a) 

(b)

7. Solve the following word problems.
(a) A publisher sold 46,750 books in the month of January; 1,52,430 books in the
     month of February and 1,60,000 books in the month of March. How many books
     did the publisher sell in 3 months?
(b) The population of a small town in the year 2011 was 2,35,170. In the next year, the
     population of the town increased by 62,000. What was the population in the
     year 2012?

8. Estimate the sum by rounding off to the nearest 100. Then, check the result by
    finding the actual sum.
(a) A bird watching survey shows 1,23,465 sparrows, 1,10, 250 mynas
      and 96, 752 parrots in a district. Estimate the total number of these common birds
      in the district.
(b) 4,21,832 + 5,36,122

9. Frame two word problems for the following sums.
(a) 1,289 + 1,364    (b) 76,354 + 82,326

10. Find the sum of the largest 6-digit, 5-digit, 4-digit and 3-digit numbers.

MATHS Std. IV Chapter 2

Chapter Two

Roman Numerals

1. Convert the following Hindu-Arabic numbers to Roman numerals.
(a) 989   (b) 451   (c) 83

2. Convert the following Roman numerals to Hindu-Arabic numbers.
(a) CCCXXXI    (b) CMLXXVI

3. Find the value of the following Roman numerals.
(a) XCIII + LXXI     (b) CCXCI - CVI

4. What comes before or after the given Roman numerals?
(a) _____________, XXXIV    (b) XLIX, _______________

5. Put the correct sign <, > or =.
(a) 46 _____ XXV            (b) LXXIV - XXXVII _______ XLII + 12

6. Change the Hindu-Arabic numerals to Roman numerals and solve the following.
    Write the answer in Roman numerals.
(a) 50 - 27    (b) 250 + 45

MATHS std. IV Chapter 1

Chapter I

Maths Worksheet V

 

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Maths Worksheet IV

Maths Worksheet IV