CBSE Class 4 Maths Open Book Assignment Worksheet

Sub: Maths [Open Book Assignment]

SECTION – A (MENTAL ABILITY)

I. Fill in the blanks:-

1. ______________ is the smallest prime number.

2. ______________ is the third multiple of 12.

3. ______________ is a process of repeated subtraction.

4. The sum of the place value and face value of 6 in 26136 is ______.

5. Numbers with only 2 factors are called _______________.

6. _____________ is the only number which is even and prime both.

7. Zero is a ____________ number.

8. 3 is a __________ of 12 as well as 15.

9. Smallest even multiple of 7 is ____________.

10. The 4th multiple of 9 is _____________.

SECTION – B

II. Table dodging:-

1. 13 × 5 = _________ 

2. 9 × _______ = 81 

3. ______ × 5 = 75 

4. 12 × 7 = _________ 

5. 19 × 4 = _________

6. 17 × 4 = _______

7. 11 × _____ = 121

8. 16 × 8 = _______

9. _______ × 7 = 56

10. 15 × 3 = _______

SECTION – C [CONCEPT]

III. Divide
(a) 76435 by 12
(b) 1331 by 11

IV. Multiply the following:-
(a) 1265 × 21
(b) 3425 × 19

V. Find the factors of the following:-
(a) 169
(b) 75

VI. Test the divisibility for the following numbers:-
(a) 221269 by 9
(b) 423528 by 4
(c) 999694 by 3

VII. Write the first 4 multiples of the following:-
(a) 11
(b) 17

VIII.Write the prime factors between 30 to 60

IX. There were 16 rows arranged in an auditorium. Each row has 1069 chairs in it. Find the total number of chairs in the auditorium.

(Comprehensive Sheet – 9)

OPERATIONS ON FRACTIONS

1. Solve:-
(a) 1(1/5) + 2(3/5)
(b) 6(2/9) + 2 (2/9)

2. Simplify the following:-
(a) 1(4/6) - 2/3
(b) 4 - 2 (5/13)

3. Multiply the following fractions:-
(a) 24 x 1/6
(b) 3 (1/6) x 3/2

4. Cost of an apple is Rs. 36/10. Find the cost of 10 such apples.

5. Aryan made 7/12 of her painting on Monday and 2/12 of it on Tuesday. What part of his painting did he make altogether?