Question

51:3 + (247 :13+1).5:4=

Answer 1

$51 \div 3 + (247 \div 13 + 1) \times \frac{5}{4}$

$17 + (19 + 1) \times \frac{5}{4}$

$17 + 20 \times \frac{5}{4} = 17 + \frac{100}{4} = 17 + 25 = 42$