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Question -

निम्नलिखित के मान गुणनखंड की सहायता से ज्ञात कीजिए
(i) 23 x 72 +77 x 72
(ii) 56 × 25 – 25 × 39 – 25 × 17
(iii) 27 × 47 + 55 × 8 + 27 × 53 + 45 × 8



Answer -

(i) 23 x72 +77 x 72
हल :
23 × 72 + 77 × 72
= 72(23 + 77)
= 72 × 100 = 7200

(ii) 56 × 25 – 25 × 39 – 25 × 17
हल :
56 × 25 – 25 × 39 – 25 × 17
25(56 – 39 – 17)
= 25 × (56 – 56)
= 25 × 0 = 0

(iii) 27 × 47 + 55 × 8 + 27 × 53 + 45 × 8
हल :
27 × 47 + 55 × 8 + 27 × 53 + 45 × 8
= 27 × 47 + 27 × 53 + 55 × 8 + 45 × 8
= 27 × (47 + 53) + 8(55 + 45)
= 27 × 100 + 8 × 100
= 2700 + 800 = 3500

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