Скачать или смотреть Q1A) Ex 11.4 Class 6 Maths Chapter 11 Algebra| Maths Class 6 CBSE NCERT Apni ClassRoom By Deepak

Q1A) Ex 11.4 Class 6 Maths Chapter 11 Algebra| Maths Class 6 CBSE NCERT Apni ClassRoom By Deepak

CHAPTER 11TH CLASS 6TH MATHEMATICS ALGEBRA-

Topics under ALGEBRA-
11.1 Introduction
11.2 Matchstick Patterns
11.3 The Idea of a Variable
11.4 More Matchstick Patterns
11.5 More Examples of Variables
11.6 Use of Variables in Common Rules
1. Perimeter of a square
2. Perimeter of a rectangle
3. Commutativity of addition of two numbers
4. Commutativity of multiplication of two numbers
5. Distributivity of numbers
11.7 Expressions with Variables
11.8 Using Expressions Practically
11.9 What is an Equation?
11.10 Solution of an Equation

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ncert solution for class 6th maths,
class 6th maths algebra,
class 6th exercise 11.4 question number 1,
class 6th maths exercise 11.4 question number 1,

EXERCISE 11.2
1. The side of an equilateral triangle is shown by l. Express the Perimeter of the equilateral triangle using l.
2. The side of a regular hexagon (Fig 11.10) is denoted by l. Express the perimeter of the hexagon using l.
(Hint : A regular hexagon has all its six sides equal in length.)
3. A cube is a three-dimensional figure as shown in Fig 11.11. It has six faces and all
of them are identical squares. The length of an edge of the cube is given by l. Find the formula for the total length of the edges of a cube.
4. The diameter of a circle is a line which joins two points on the circle and also passes through the centre of the circle. (In the adjoining figure (Fig 11.12) AB is a diameter of the circle; C is its centre.) Express the diameter of the circle (d) in terms of its radius (r).
5. To find sum of three numbers 14, 27 and 13, we can have two
ways:
(a) We may first add 14 and 27 to get 41 and then add 13 to it to get the total sum
54 or
(b) We may add 27 and 13 to get 40 and then add 14 to get the sum 54.
Thus, (14 + 27) + 13 = 14 + (27 + 13)

EXERCISE 11.3
1. Make up as many expressions with numbers (no variables) as you can from three
numbers 5, 7 and 8. Every number should be used not more than once. Use only
addition, subtraction and multiplication.
(Hint : Three possible expressions are 5 + (8 – 7), 5 – (8 – 7), (5 × 8) + 7; make the
other expressions.)
2. Which out of the following are expressions with numbers only?
(a) y + 3 (b) (7 × 20) – 8z
(c) 5 (21 – 7) + 7 × 2 (d) 5
(e) 3x (f) 5 – 5n
(g) (7 × 20) – (5 × 10) – 45 + p
3. Identify the operations (addition, subtraction, division, multiplication) in forming the following expressions and tell how the expressions have been formed.
(a) z +1, z – 1, y + 17, y – 17 (b) 17y,
y 17 , 5 z
(c) 2y + 17, 2 y – 17 (d) 7 m, – 7 m + 3, – 7 m – 3
4. Give expressions for the following cases.
(a) 7 added to p (b) 7 subtracted from p
(c) p multiplied by 7 (d) p divided by 7
(e) 7 subtracted from – m (f) – p multiplied by 5
(g) – p divided by 5 (h) p multiplied by – 5 allowed ?
Is (y + 8) allowed ? Is 15y allowed ?
5. Give expressions in the following cases.
(a) 11 added to 2m (b) 11 subtracted from 2m
(c) 5 times y to which 3 is added (d) 5 times y from which 3 is subtracted
(e) y is multiplied by – 8
(f) y is multiplied by – 8 and then 5 is added to the result
(g) y is multiplied by 5 and the result is subtracted from 16
(h) y is multiplied by – 5 and the result is added to 16.
6. (a) Form expressions using t and 4. Use not more than one number operation. Every expression must have t in it.
(b) Form expressions using y, 2 and 7. Every expression must have y in it. Use only
two number operations. These should be different.