5*67=

a. (67*10) : 2

b. (67x2) + (67*2)

c. (6 * 7) * 5

d. (5*6) + (5*7)

a).

= (67*10) : 2

= 670 : 2

= 335

Explanation:

a).

= (67*10) : 2

= 670 : 2

= 335

So, 5*67 = (67*10) : 2

=> 335 = 335

b).

= (67x2) + (67*2)

= 134 * 134

= 268

So, 5*67 ≠ (67x2) + (67*2)

=> 268 ≠ 335

c).

= (6 * 7) * 5

= 42 * 5

= 210

So, 5*67 ≠ (6*7) * 5

=> 210 ≠ 335

d).

= (5*6) + (5*7)

= 30 + 35

= 65

So, 5*67 ≠ (5*6) + (5*7)

=> 65 ≠ 335

Hence, (a) is the correct answer.