Decimals Exercise 8.2 1). Express as rupees using decimals. (a) 5 paise (b) 75 paise (c) 20 paise (d) 50 rupees 90 paise (e) 725 paise Answer: (a) 5 paise 1 Rupee = 100 paise 1 paise = 1/100 Rupee 5 paise = 5/100 = Rs 0.05 […]
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Integers Exercise 6.3 1). Find (a) 35 – (20) (b) 72 – (90) (c) (– 15) – (– 18) (d) (–20) – (13) (e) 23 – (– 12) (f) (–32) – (– 40) Answer: (a) 35 – (20) 35 – (20) = 35 – 20 = 15 (b) 72
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Integers Exercise 6.2 1). Using the number line write the integer which is: (a) 3 more than 5 Ans: 8. (b) 5 more than –5 Ans: 0. (c) 6 less than 2 Ans: -4. (d) 3 less than –2 Ans: -5. 2). Use number line and add the following integers: (a) 9 + (– 6) Ans: 9 +
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Integers Points to remember: (a) Every positive integer is larger than every negative integer. (b) Zero is less than every positive integer. (c) Zero is larger than every negative integer. (d) Zero is neither a negative integer nor a positive integer. (e) Farther a number from zero on the right, larger is its value.
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Understanding Elementary Shapes Exercise 5.7 Questions with (*) sign are open-ended questions. 1). Say True or False. (a). Each angle of a rectangle is a right angle. (b). The opposite sides of a rectangle are equal in length. (c). The diagonals of a square are perpendicular to one another. (d). All the sides of a
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Understanding Elementary Shapes Exercise 5.6 1). Name the types of following triangles: (a). Triangles with lengths of sides 7 cm, 8 cm and 9 cm. (b) ∆ABC with AB = 8.7 cm, AC = 7 cm and BC = 6 cm. (c). ∆PQR such that PQ = QR = PR = 5 cm. (d). ∆DEF
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Understanding Elementary Shapes Exercise 5.3 Questions with (*) sign are open-ended questions. 1). Match the following: (i) Straight angle a). less than one-fourth of a revolution (ii) Right angle b). More than half a revolution (iii) Acute angle
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Understanding Elementary Shapes Exercise 5.2 Questions with (*) sign are open-ended questions. 1). What fraction of a clockwise revolution does the hour hand of a clock turn through when it goes from a). 3 to 9 b). 4 to 7 c). 7 to 10 d). 12 to 9 e). 1 to 10 f). 6 to
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Understanding Elementary Shapes Exercise 5.1 Questions with (*) sign are open-ended questions. 1). What is the disadvantage in comparing line segments by mere observation? The disadvantage in comparing line segments by mere observation is that there may be possible errors in viewing. 2). Why is it better to use a divider than
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Basic Geometrical Ideas Exercise 4.6 Examples for Practice 1). From the figure, identify: (a) the centre of the circle O is the centre of the circle. (b) three radii Radius OA, OB, OC (c) a diameter AC is the diameter. (d) a chord ED is
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