Zad.3
1. 3/8 x 4 = 1 1/2
5 x 7/15 = 2 1/3
2 1/3 > 1 1/2
P
2. P
3. 3 2/5 + 3 2/5 + 3 2/5 = 3 x 3 2/5
3 x 3 2/5 [tex]\neq[/tex] 5 x 3 2/5
F
4. 5 3/7 + 5 3/7 + 5 3/7 = 3 x 5 3/7
3 x 5 3/7 [tex]\neq[/tex] (5 3/7) [tex]3^{2}[/tex]
F
Zad.4
2[tex]\frac{2}{3}[/tex] x 3[tex]\frac{3}{4}[/tex] = [tex]\frac{8}{3}[/tex] x [tex]\frac{15}{4}[/tex] = [tex]\frac{2}{1}[/tex] x [tex]\frac{5}{1}[/tex] = [tex]\frac{10}{1}[/tex] = 10
(8 skracamy z 4 a 15 z 3 )
Odp. D
