zad 1. Oblicz
a)2½*¾=
b)2/7*5 i 3/4=
c)2 i 4/5*3 i 2/3=
d)1 i 2/3 *2 i 1/2=
e)2 i 1/4* 3 i 2/5=

zad 2 Oblicz( skracając,jeśli to możliwe)

a)3/4 * 5/6=
8/5 * 7/12=
4/9 * 7/10=
b)
5/6 * 9/10=
4/7 * 21/24=
3/8 * 14/15=
c)
1 i 1/3 * 2 i 1/4=
2 i 1/3 * 1 i 1/5=
3 i 1/5 * 1 i 5/6=
Proszę o szybką odpowiedź i o obliczenia.

3

Odpowiedzi

2009-12-08T13:49:43+01:00
Zad.1
a)2½*¾= 5/2*3/4 = 15/8 = 1⁷/₈
b)2/7*5 i 3/4= 2/7*23/4 = 46/28 = 1⁹/₁₄
c)2 i 4/5*3 i 2/3= 14/5*11/3 = 154/15 = 10⁴/₁₅
d)1 i 2/3 *2 i 1/2= 5/3* 5/2 = 25/6 = 4¹/₆
e)2 i 1/4* 3 i 2/5= 9/4*17/5 = 153/20 = 7¹³/₂₀
Zad.2
a)3/4 * 5/6= 15/24 = 5/8
8/5 * 7/12= 56/60 = 14/15
4/9 * 7/10= 28/90 = 14/45
b)
5/6 * 9/10= 45/60 = 3/4
4/7 * 21/24= 84/168 = 1/2
3/8 * 14/15= 42/120 = 7/20
c)
1 i 1/3 * 2 i 1/4= 4/3*9/4 = 36/12 = 3
2 i 1/3 * 1 i 1/5= 7/3*6/5 = 42/15 = 2,8
3 i 1/5 * 1 i 5/6= 16/5*11/6 = 176/30 = 5¹³/₁₅
2009-12-08T13:50:00+01:00
1.
a) 5/2 * 3/4 = 1 i 7/8
b) 2/7 * 23/4 = 23/14 = 1 i 1/14
c) 14/5 * 11/3 = 154/15 = 10 i 4/15
d) 5/3 * 5/2 = 25/6 = 4 i 1/6
e) 9/4 * 17/5 = 153/20 = 7 i 13/20

2.
a) 15/24 = 5/8
14/15
28/90
b) 3/4
1/2
7/20
c) 4/2 * 9/4 = 9/2 = 4 i 1/2
7/3 * 6/5 = 14/5 = 2 i 4/5
16/5 * 11/6 = 176/30 = 5 i 13/15
2009-12-08T13:51:38+01:00
A)2½*¾= 5/2 * 3/4 = 15/8 = 1 i 7/8
b)2/7*5 i 3/4= 2/7 * 23/7 = 23/14 = 1 i 9/14
c)2 i 4/5*3 i 2/3= 154/15 = 10 i 4/15
d)1 i 2/3 *2 i 1/2= 5/3 * 5/2 = 4 i 1/6
e)2 i 1/4* 3 i 2/5= 9/4 * 17/5 = 153/ 20 = 7 i 13/20

zad 2 Oblicz( skracając,jeśli to możliwe)

a)3/4 * 5/6= 1/4 * 5/2 = 5/8
8/5 * 7/12= 2/5 * 7/3 = 14/15
4/9 * 7/10=2/9 * 7/5 = 14/45
b)
5/6 * 9/10= 1/2 * 3/2 = 3/4
4/7 * 21/24=3/6 = 1/2
3/8 * 14/15= 1/4 * 7/5 = 7/20
c)
1 i 1/3 * 2 i 1/4= 1/3 * 9/1 = 3
2 i 1/3 * 1 i 1/5= 7 * 2/5 = 14/5 = 2 i 4/5
3 i 1/5 * 1 i 5/6=16/5 * 11/6 = 88/15 = 5 i 13/15