Odpowiedź:
Zad 6
a) Ob = 4 x 3/4 = 3
P = 3/4 x 3/4 = 9/16
b) Ob = 2 x 1 3/5 + 2 x 3 1/2 = 16/5 + 7 = 3 1/5 + 7 = 10 1/5
P = 1 3/5 x 3 1/2 = 8/5 x 7/2 = 56/10 = 5 6/10
c) Ob = 2 x 2 2/5 + 2 x 6 1/4 = 2 x 12/5 + 2 x 25/4 = 24/5 + 50/4 = 96/20 + 250/20 = 346/20 = 17 6/20
P = 2 2/5 x 6 1/4 = 12/5 x 25/4 = 300/20 = 15
Zad 7
a) 3m = 3 x 2 1/8 = 3 x 17/8 = 51/8 = 6 3/8
b) 4k = 4 x 1 3/4 = 4 x 7/4 = 28/4 = 7
c) 2m + 2k = 2 x 2 1/8 + 2 x 1 3/4 = 2 x 17/8 + 2 x 7/4 = 34/8 + 14/4 = 34/8 + 28/8 = 62/8 = 7 6/8