Exercise 15.1 1. The following graph shows the temperature of a patient in a hospital, recorded every hour. (a) What was the patient’s temperature at 1 p.m.? (b) When was the patient’s temperature 38.5° C? (c) The…

Exercise 16.1 Find the values of the letters in each of the following and give reasons for the steps involved. 1. Solution: Say, A = 7 and we get, 7+5 = 12 In which one’s place is…

Exercise- 1.1 1. Following number line shows the temperature in degree Celsius (co) at different places on a particular day. (a) Observe this number line and write the temperature of the places marked on it. Solution: –…

Exercise 2.1            1. Solve: (i) 2 – (3/5) Solution: – For subtraction of two unlike fractions, first change them to the like fractions. LCM of 1, 5 = 5 Now, let us change each of the given…

Exercise 3.1 1. Find the range of heights of any ten students of your class. Solution: – Let us assume heights (in cm) of 10 students of our class. = 130, 132, 135, 137, 139, 140, 142,…

Exercise 4.1 1. Complete the last column of the table. S. No. Equation Value Say, whether the equation is satisfied. (Yes/No) (i) x + 3 = 0 x = 3 (ii) x + 3 = 0 x…

EXERCISE 5.1  1. Find the complement of each of the following angles: (i) Two angles are said to be complementary if the sum of their measures is 90o. The given angle is 20o Let the measure of…

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…

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….