Odpowiedź:
6. a) Ob= 3/4 * 4 = 3m ; P= 3/4*3/4=9/16m
b) Ob= 3 1/2*2+1 3/5*2= 10 1/5m ; P= 1 3/5*3 1/2 = 5 3/5m
c) Ob= 6 1/4 *2 + 2 2/5 *2 = 25/2 + 24/2 = 49/2 = 24 1/2m ; P= 6 1/4*2 2/5 = 15m
7. a) Ob = m+m+m = 3m
m=2 1/8 Ob = 3 * 2 1/8 = 6 3/8
b) Ob= k+k+k+k=4k
k= 1 3/4 Ob= 1 3/4 * 4 = 7
c) Ob= 2k+2m
Ob= 2 * 1 3/4 + 2* 2 1/8 = 7/2 + 17/4 = 31/4 = 7 3/4
Szczegółowe wyjaśnienie: