Odpowiedź:
zad 5
a) 3 * 3/8 = 9/8 = 1 1/8
b) 3/5 * 4/7 = 12/35
c) 5/16 * 24 = 5/2 * 3 = 15/2 = 7 1/2
d) 2 2/9 * 3/5 = 20/9 * 3/5 = 4/3 * 1 = 4/3 = 1 1/3
e) 3 1/2 * 2 4/7 = 7/2 * 18/7 = 1 * 9 = 9
f) 4 4/5 * 3 3/4 = 24/5 * 15/4 = 6 * 3 = 18
g) 4/9 : 8 = 4/9 * 1/8 = 1/9 * 1/2 = 1/18
h) 6 : 2/3 = 6 * 3/2 = 3 * 3 = 9
i) 1 1/8 : 3 = 9/8 * 1/3 = 3/8 * 1 = 3/8
j) 8 1/3 : 5/6 = 25/3 * 6/5 = 5 * 2 = 10
k) 4 1/5 : 2 1/3 = 21/5 : 7/3 = 21/5 * 3/7 = 3/5 * 3 = 9/5 = 1 4/5
l) 1 3/8 : 6 3/5 = 11/8 : 33/5 = 11/8 * 5/33 = 1/8 * 5/3 = 5/24
