Q.

18 × 6 = ?

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a

(10 + 8) x 6

b

18 x (5 + 1)

c

(10 + 8) x (5 + 1)

d

All the above

answer is D.

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Detailed Solution

Case1: (10 + 8) x 6 = (10 x 6) + (8 x 6) = 60 + 48 = 108 

Case2: 18 x (5 + 1) = (18 x 5) + (18 x 1) = 90 + 18 = 108 

Case3: (10 + 8) x (5 + 1) = (10 x 5) + (10 x 1) + (8 x 5) + (8 x 1) = 50 + 10 + 40 + 8 = 108

Hence, all options are correct

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