1.oblicz a 2/9 + 8/9 b 3/7+1/7 c 1/8+3/8 g 3 5/7+1 3/7 h 1 5/9+2 4/9 i 8 3/4+9 3/4

Odpowiedź:
a)2/9 + 8/9 = 10/9 = 1 1/9
b)3/7 + 1/7 = 4/7
c)1/8 + 3/8 = 4/8 = 1/2
g)3 5/7 + 1 3/7 = 4 8/7 = 5 1/7
h)1 5/9 + 2 4/9 = 3 9/9 = 4
i)8 3/4 + 9 3/4 = 16 6/4 = 17 2/4 = 17 1/2
Szczegółowe wyjaśnienie: