Chapter – 8: Comparing Quantities
Exercise 8.1 1. Find the ratio of: (a) ₹ 5 to 50 paise Solution: – We know that, ₹ 1 = 100 paise Then, ₹ 5 = 5 × 100 = 500 paise Now we have to…
Chapter – 9: Rational Numbers
Exercise 9.1 1. List five rational numbers between: (i) -1 and 0 Solution: – The five rational numbers between -1 and 0 are, -1< (-2/3) < (-3/4) < (-4/5) < (-5/6) < (-6/7) < 0 (ii) -2…
Chapter – 10: Practical Geometry
Exercise 10.1 1. Draw a line, say AB, take a point C outside it. Through C, draw a line parallel to AB using ruler and compasses only. Solution: – Steps for construction 1. Draw a line AB….
Chapter – 11: Perimeter and Area
Exercise 11.1 1. The Length and the breadth of a rectangular piece of land are 500 m and 300 m, respectively. Find (i) Its area (ii) the cost of the land, if 1 m2 of the land costs…
Chapter – 12: 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. Solution: – = Y – z (ii) One-half of the sum of numbers x…
Chapter – 13: Exponents and Powers
Exercise 13.1 1. Find the value of: (i) 26 Solution: – The above value can be written as, = 2 × 2 × 2 × 2 × 2 × 2 = 64 (ii) 93 Solution: – The…
Chapter – 15: Visualizing Solid Shapes
Exercise 15.1 1. Identify the nets which can be used to make cubes (cut out copies of the nets and try it): (i) Solution: – The given net cannot be folded as cube. Because, it can be…
Chapter 4: Basic Geometrical Ideas
EXERCISE 4.1 1. Use the figure to name: (a) Five points (b) A line (c) Four rays (d) Five line segments Solutions: (a) The five points are D, E, O, B and C (b) A line is (c)…
Chapter 5: Understanding Elementary Shapes
Exercise-5.1 1. What is the disadvantage in comparing line segments by mere observation? Solutions: By mere observation we can’t compare the line segments with slight difference in their length. We can’t say which line segment is of…
Chapter 6: Integers
Integers Ex- 6.1 1. Write opposites of the following: (a) Increase in weight (b) 30 km north (c) 80 m east (d) Loss of Rs 700 (e) 100 m above sea level Solution: We use the concept…
