std 7 cbse maths

NCERT Solutions Class 7 Maths Chapter 12 Algebraic Expressions Exercise 12.1

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Algebraic Expressions Exercise 12.1 1). Get the algebraic expressions in the following cases using variables, constants and arithmetic operations. (i) Subtraction of z from y. (ii) One-half of the sum of numbers x and y. (iii) The number z multiplied by itself. (iv) One-fourth of the product of numbers p and q. (v) Numbers x and […]

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NCERT Solutions Class 7 Maths Chapter 8 Comparing Quantities Exercise 8.2

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Comparing Quantities Exercise 8.2 1). Convert the given fractional numbers to per cents. (a) 1/8                         (b) 5/4 (c) 3/40                        (d) 2/7 Solution: (a) 1/8                         (b) 5/4 (c) 3/40                        (d) 2/7 2). Convert the given decimal fractions to per cents. (a) 0.65                                     (b) 2.1 (c) 0.02                                     (d) 12.35 Solution: (a) 0.65    0.65 =

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NCERT Solutions Class 7 Maths Chapter 4 Simple Equations Exercise 4.3

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Simple Equations Exercise 4.3 1). Solve the following equations: (a) 2 y + 5/2 = 37/2                             (b) 5t + 28 = 10 (c) a/5 + 3 = 2                                   (d) q/4 + 7 = 5 (e) 5/2 x = –5                                     (f) 5/2 x = 25/4 (g) 7m+ 19/2 =13                               (h)

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NCERT Solutions Class 7 Maths Chapter 4 Simple Equations Exercise 4.2

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Simple Equations Exercise 4.2 1). Give first the step you will use to separate the variable and then solve the equation: (a) x – 1 = 0                               (b) x + 1 = 0 (c) x – 1 = 5                               (d) x + 6 = 2 (e) y – 4 = – 7                           

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NCERT Solutions Class 7 Maths Chapter 3 Data Handling Exercise 3.4

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Data Handling Exercise 3.4   1). Tell whether the following is certain to happen, impossible, can happen but not certain. (i) You are older today than yesterday. (ii) A tossed coin will land heads up. (iii) A die when tossed shall land up with 8 on top. (iv) The next traffic light seen will be

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