Question

a) 1/2 + 5/4
b) 1/9 + 3/7
c) 1/6 + 3/8
d) 10/39 + 9/117
/ = supra

Answer 1

Fracțiile trebuie aduse la același numitor pentru a le putea calcula

$a) \: \frac{1}{2} + \frac{5}{4} = \frac{2 + 5}{6} \\ b) \: \frac{1}{9} + \frac{3}{7} = \frac{7 + 26}{63} = \frac{34}{63} \\ c) \: \frac{1}{6} + \frac{3}{8} = \frac{4 + 9}{24} = \frac{13}{24} \\ d) \: \frac{10}{39} + \frac{9}{117} = \frac{10 + 3}{39} = \frac{13}{39} = \frac{1}{3}$