Question

(ii) - 47
(iii) o
5. Using convenient grouping, evaluate :
(i) (- 5) x 19 (- 60)
(ii) 25 x 31 x (-4)
(iii) 97 * 25 * (- 2) × (-4) (iv) (- 2) 4896 * (-5)
6. If a = 3, b = – 2, c = – 1, verify that :
(i) b * (a + c) = b < a + b * c (ii) bxсxa = axbxc = cxахь
(iii) b × c = c b
7. If an operation '*' be defined as a * b = a × b – (a + b), evaluate :
(i) 2 * 5
(ii) (- 4) * (- 6)
(iii) 13 * (- 6)
DIVISION OF INTEGERS
Division is inverse operation of multiplication.
ince 3 x 6 = 18
herefore, 18 = 3 = 6, 18 = 6 = 3
milarly, (-7) * (- 6) = 42 therefore, 42 = (-7) = - 6, 42 = (- 6) = - 7
Iso, (-8) x 4 = (-32) therefore, (- 32) = 4 = – 8, (- 32) = (- 8) = 4​

Answer 1

Answer:

5.(i) 1140

(ii) -99

(iii) 19400

(iv) 48960