8/18/2019 Rd Sharma New

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(i) 12 ×  7 = 84

(ii) (−15)   ×   8 = −120

(iii) (−25) ×  (−9) = 225

(iv) 125 ×  (−8) = −1000

(i) 3 × (-8) × 5 = - =- 120

(ii) 9 × (-3) × (-6) = = 162

(iii) (-2) × 36 × (-5) = = 360

(iv) (-2) × (-4) × (-6) × (-8) = =384

(i) 1487 × 327 + (-487) × 327 = -

(ii) 28945 × 99 - (-28945) = - -

 The integer, whose pro!"t with -1 is the given n!#$er, "%n $e &o!n $'

#!tip'ing the given n!#$er $' -1

 Th!s, we h%ve*

(i) 58 × (-1) = -58

(ii) 0 × (-1) =- = 0

(iii) (-225) × (-1) = 225

eg%tive n!#$ers, when #!tipie even n!#$er o& ti#es, give % positive

n!#$er owever, when #!tipie o n!#$er o& ti#es, the' give % neg%tive

n!#$er There&ore, we h%ve*

(i) (neg%tive) 8 ti#es × (positive) 1 ti#e = = positive integer

(ii) (neg%tive) 21 ti#es × (positive) 3 ti#es = = neg%tive integer

(iii) (neg%tive) 199 ti#es × (positive) 10 ti#es = = neg%tive integer