Question

(i) For any integer a, what is (–1) × a equal to? (ii) Determine the integer whose product with (–1) is 5

SCERT Class 7 Telangana, Maths Chapter 1 Integers

Answer 1

(i) If the integer is positive, then  a*(-1) = -a
    If the integer is 0 (zero), then a*(-1)=0
    If the integer is negative, then a*(-1)= |a|

Generally, a*(-1) = -a

(ii) The integer whose product with (-1) is 5   is  (- 5).
    

Answer 2

(i) (-1) × a = -a
(ii) Let the integer be x
x × (-1) = 5
x = 5/(-1)
x = -5