Odpowiedzi

2010-04-16T16:45:42+02:00
A) (1 2/5 + 0,5) : 2 = (7/5 + 1/2) :2 = (14/10 + 5/10) : 2 = 19/10 * 1/2 = 19/20
b) 5/8 * 4 2/10 - 1/16 = 5/8 * 42/10 - 1/16 = 42/16-1/16 = 2 9/16
c) 4/7 (0,2 + 1/4) = 4/7 (2/4 + 1/4) = 4/7*3/4 = 3/7
d) 4,5 - 3/4*1/3 = 45/10 - 1/4 = 180/40 - 10/40 = 170/40 = 4 1/4
2010-04-16T16:48:40+02:00
J) (1½+0,5):2=(1,5+0,5):2= 2:2=1
k)⅝*4,2-(¼)=0,625*4,2-¼=2,625-¼=???
l)??
i)??