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CBSE MATH STUDY: ASSIGNMENT FOR THE SESSION 2011-2012 Class: VIII ASSIGNMENT FOR THE SESSION 2011-2012 Class: VIII Subject : Mathematics Term -II Trapezium 1. The parallel sides of a trapezium are 25 cm and 11 cm, while its non parallel sides are 15cm and 13cm. find the area of the trapezium.  2. The parallel sides of a trapezium are 78 cm and 52 cm, while its non parallel sides are 28cm and 30cm. find the area of the trapezium. 3. The parallel sides of a trapezium are 12cm and 36cm respectively. Its non parallel sides are each equal to 15cm. Find the area of the trapezium. AREA  1. Verify Euler’s formula for a) Square pyramid b) Pentagonal prism c) tetrahedron  2. The area of a rhombus is equal to the area of a triangle whose base and the corresponding altitude  are 24.8 cm and 16.5 cm respectively. If one of the diagonal of the rhombus is 22 cm, find the length of the other diagonal. 3. The floor of a rectangular hall has a perimeter 250m. If the cost of paining the four

CBSE Sample Papers Class 8th Maths,VIII Maths Solved Questions VIII_science_ sample paper term-II Download File VIII_maths_sample_paper_term-II Download File VIII_maths_test_jan_2012_by_jsunil_term-ii Download File http://jsuniltutorial.weebly.com/viii-sample-papers.html

8th maths Sample paper term -1-2011

CBSE SAMPLE PAPER MATHEMATICS (Class-8) : CBSE TEST PAPER 8TH MATHEMATICS SA-1 1. What least number must be subtracted from 7250 to get a perfect square? Also, find the square root o...

CBSE 8th CHAPTER: Percentage For All class 8th Maths test paper   JSUNIL TUTORIAL 1. Choose the correct answer. (i) There are 5 oranges in a basket of 25 fruits. The percentage of oranges is ___ (A) 5% (B) 25% (C) 10% (D) 20% (ii) 2/25 = _______ %. (A) 25 (B) 4 (C) 8 (D) 15 (iii) 15% of the total number of biscuits in a bottle is 30. The total number of biscuits is _______.

CBSE MATH STUDY: Problem related to factorization,ratiolization : Problem-1 If the values of a – b and ab are 6 and 40 respectively, find the values of a 2 + b 2 and (a + b) 2 . Solution: a 2 + b 2 = (a – b) 2 + 2ab = 6 2 + 2(40) = 36 + 80 = 116 (a + b) 2 = (a – b) 2 + 4ab = 6 2 + 4(40)= 36 + 160 = 196 Problem-2. If (x + p)(x + q) = x 2 – 5x – 300, find the value of p 2 + q 2 . Solution: By product formula, we have (x + p) (x + q) = x 2 + (p + q)x + pq. So, by comparison, we get p + q = –5, pq = –300. Now, we have p 2 + q 2 = (p + q) 2 – 2 pq = (–5) 2 –2(–300) = 25 + 600 = 625. Problem-3. If (x + a)(x + b)(x + c) ≡ x 3 – 6x 2 + 11x – 6, find the value of a 2 + b 2 + c 2 . Solution: From the product formula, we have (x+a)(x+b)(x+c) = x 3 + (a + b + c)x 2 + (ab + bc + ca)x + abc. Comparing, we get a + b + c = –6, ab + bc + ca = 11, abc = –6. ∴ a 2 + b 2 + c 2 = (a + b + c) 2 –2 (ab + bc + ca) = (– 6) 2 – 2(11) = 36 – 22 = 14. Problem-4 If a+b=2 and a2+b2=8,find a3+b3 and a4+b4. CB

CBSE TEST PAPER 8th Algebric Expression 1 .      Numerical coefficient of 8x 3 yz 2 is ________    2.      Monomial is a ________________ 3.          Write like terms from 2x 2 , 2x, 2x 3 , - 5x, 11x 4                                           4.      Write numerical coefficient of . 3x 3 yza 2   5.      Find area of rectangle with sides 3x and 5y       6.      Factorise 3xy + 9x 2 y 3 7.      Divide 7x 2 y 2 z 2 ÷ 21xyz 8.      Subtract 5x 2 – 4y 2 + 6y – 3 from  7x 2 – 4xy + 8y 2 + 5x – 3y. 9.      Add 4y (3y 2 + 5y – 7) and 2 (y 3 – 4y 2 + 5)          10.   Simplify (a + b) (2a – 3b + c) – (2a – 3b) c.      11.   . Simplify (a + b + c)(a + b – c) 12.   find the products. (i) (2a2 + 9) (2a2 + 5)  (ii) (0.4p – 0.5q) 2   13.   Simplify.  (m 2 – n 2 m) 2 + 2m 3 n 2                14.   Evaluate (i) 998 2   (ii) 297 × 303 (iii) (1.02) 2 – (0.98) 2 15.   Find the value of x 2 +y 2  if x+y =12 and xy= 14 16.   Find the value using algebric formula i] 93x94     ii]  704 2 17.

LONG ANSWER TYPE QUESTIONS 1. Solve for x and y 1/ 2[2x+3y] + 12/7[3x-2y] = ½ , 7/ [2x+3y] + 4/[3x-2y] = 2 for 2x + 3y ¹0 and 3x – 2y¹ 0 2. Solve for p and q [p+q ] / pq =2 and [p-q ] / pq =6 3. Solve for x and y , 2/[3x+2y] + 3/[3x-2y]=17/5 ; 5/[3x+2y] + 1/[3x-2y]=2 4. Solve for x and y . 6 /[x+y] = 7/ [x-y] + 3 ; 1/ 2[x+y] = 1/ 3[x-y] 5. . Solve for x and y ; 2/√x + 3/√y =2 ; 4/√x - 9/√y =2 ; 6. ax + by = 1 ; bx+ay = [(a+b)2 ]/ [a2 +b2] - 1 7. If from twice the greater of two nos., 20 is subtracted, the result is the other no. If from twice the smaller no., 5 is subtracted, the result is the greater no. Find the nos.

Quadrilaterals  A quadrilateral is a closed plane figure bounded by four line segments. E.g. The figure ABCD shown here is a quadrilateral. A line segment drawn from one vertex of a quadrilateral to the opposite vertex is called a diagonal of the quadrilateral. For example, AC is a diagonal of quadrilateral ABCD. Types of Quadrilaterals There are six basic types of quadrilaterals: 1. Rectangle: Opposite sides of a rectangle are parallel and equal. All angles are 90º. 2. Square Opposite sides of a square are parallel and all sides are equal. All angles are 90º. 3. Parallelogram Opposite sides of a parallelogram are parallel and equal. Opposite angles are equal. 4. Rhombus All sides of a rhombus are equal and opposite sides are parallel. Opposite angles of a rhombus are equal. The diagonals of a rhombus bisect each other at right angles. 5. Trapezium A trapezium has one pair of opposite sides parallel. A regular trapezium has non-parallel sides equal and its ba

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CBSE ADDA Square and square root-3 class 8 Square and square root-3 class 8 Square and square root-2 class 8 Square and square root -1 class 8 NCERT SOLUTION Rational Numbers for class 8 NCERT SOLUTION Rational Numbers for class 8 Linear Equations in One Variable for class 8 Linear Equations in One Variable for class 8 ClCBSE NCERT Mathematics Solution   class 8

CBSE ADDA NCERT SOLUTION Rational Numbers for class 8 NCERT SOLUTION Rational Numbers for class 8 Linear Equations in One Variable for class 8 Linear Equations in One Variable for class 8 Class 8, CBSE NCERT Mathematics Solution Express each phrase as an algebric expression -1 Express each phrase as an algebric expression-2

1. For what value of ‘a’ the number -11/a is not a rational number.                                        a) -1 b) 1 c) 0 d) 10  2 . The product of two rational numbers is-7/8 . If one of the numbers is 1/-6.Find the other.                                       a) 37/8 b) -42/8 c) 21/4 d) -7/48  3. Find the value of. -9/5 + -8 /5 ÷ 5/2 x -5/4                                        a) -1 b) -3 c) 2 d) -8  4. The additive inverse of -1/3 - ( -1/3 ) is ________.                                       a) 1/3 b) 0 c) -1/3 d) None of these.  5.The sum of three rational numbers is-1/5. If two of the numbers are, 3/10 and -2/5 find the third number.                                       a)-7/10 b)-11/10 c)2/3 d) -1/10  6. The sum of three rational numbers is-1/5. If two of the numbers are, 3/10 and -2/5 find the third number.                                       a)-7/10 b)-11/10 c)2/3 d) -1/10   7 What is the quotient when a non-zero rational number is divided by its additive inverse.       

MATH COMPLETE STUDY Q1.  Express −35 as a rational number with denominator: (i) 20 (ii) −40 Q2. Arrange the following numbers in ascending order: 4 /− 9 ,  − 5 /12 ; 7/ − 18 ; − 2/ 3 Q3. Arrange the following numbers in descending order: − 5, 6/  ; − 7/ 12 ; − 13/ 28 ; 23/ − 24 Q4. Represent −25/6 on the number line. Q5. Represent 42/3on the number line. Q6. What number should be added to −78to get 49? Q7. The sum of two rational numbers is −12. If one of the numbers is 56, find the other. Q8. What number should be subtracted from −23 to get −12? Q9. Subtract: −3213 from −65 Q10. Find the following products: (i) 16−21×145 (ii) 724×−48 Q11. Verify whether the given statement is true or not: (i) <59÷13) ÷ 52=  59÷(13÷52) Q12. Divide the sum of 135and−127by the product of −317and1−2. Q13. The product of two ration