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 – 14: Symmetry
Exercise 14.1 1. Copy the figures with punched holes and find the axes of symmetry for the following: (a) Solution: – A figure has a line of symmetry, if there is a line about which the figure…
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 2: Whole Numbers
Ex-2.1 1.Write the next three natural numbers after 10999. Solution: Three natural number = 1,2,3. The next three natural number after 10999 10999 + 1 = 11000 10999 + 2 = 11001 10999+ 3 = 11002 2….
Chapter 1: Knowing Our Numbers
Ex- 1.1 1. Fill in the blanks: (a) 1 lakh = _______ ten thousand. (b) 1 million = _______ hundred thousand. (c) 1 crore = _______ ten lakhs. (d) 1 crore = _______ million. (e) 1 million…
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 – 7: Congruence of Triangles
Exercise 7.1 1. Complete the following statements: (a) Two-line segments are congruent if ___________. Solution: – Two line segments are congruent if they have the same length. (b) Among two congruent angles, one has a measure of…
Chapter 7: Fractions
EXERCISE 7.1 Solution: = 2/4 = 8/9 = 4/8 = 1/4 = 3/7 = 3/9 = 10/10 = 1 = 4/9 = 3/8 = 4/8 2. Color the part according to the given fraction. Solution: 3….
Chapter 8: Decimals
EXERCISE 8.1 Solution: Hundreds (100) Tens (10) Ones (1) Tenths (1/10) 0 3 1 2 1 1 0 4 2. Write the following decimals in the place value table. (a) 19.4 (b) 0.3 (c)…
