Odpowiedź:
a) 1/2- 3/6= 3/6- 3/6=0
1/2 - 3/8= 4/8-3/8= 1/8
4/5 - 19/25= 20/25- 19/25= 1/25
b) 2 i 2/3 - 1 i 4/5= 2 i 10/15 - 1 i 12/15= 1 i 25/15 -1 i 12/15= 13/15
1 i 2/6 - 2/3= 1 i 2/6 - 4/6= 8/6- 4/6= 4/6= 2/3
2 i 1/4 - 1 i 6/8= 2 i 2/8- 1 i 6/8= 1 i 10/8- 1 i 6/8= 4/8= 1/2
c) 9 i 1/2 - 3 i 5/8= 9 i 4/8- 3 i 5/8= 8 i 12/8- 3 i 5/8= 5 i 7/8
5 i 1/10 - 4 i 3/5= 5 i 1/10- 4 i 6/10= 4 i 11/10- 4 i 6/10= 5/10= 1/2
2 i 1/21 - 1 i 5/7= 2 i 1/21 - 1 i 15/21 = 1 i 22/21- 1 i 15/21= 7/21= 1/3
d) 2 i 7/9 - 1 i 1/6= 2 i 14/18 -1 i 3/18= 1 i 11/18
3 i 4/15 - 1 i 11/30= 3 i 8/30 -1 i 11/30= 2 i 38/30- 1 i 11/30= 1 i 27/30=
= 1 i 9/10
2 i 7/30- 1 i 17/20= 2 i 14/60- 1 i 51/60= 1 i 74/60- 1 i 51/60= 23/60
Szczegółowe wyjaśnienie:
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Odpowiedź:
a) 1/2- 3/6= 3/6- 3/6=0
1/2 - 3/8= 4/8-3/8= 1/8
4/5 - 19/25= 20/25- 19/25= 1/25
b) 2 i 2/3 - 1 i 4/5= 2 i 10/15 - 1 i 12/15= 1 i 25/15 -1 i 12/15= 13/15
1 i 2/6 - 2/3= 1 i 2/6 - 4/6= 8/6- 4/6= 4/6= 2/3
2 i 1/4 - 1 i 6/8= 2 i 2/8- 1 i 6/8= 1 i 10/8- 1 i 6/8= 4/8= 1/2
c) 9 i 1/2 - 3 i 5/8= 9 i 4/8- 3 i 5/8= 8 i 12/8- 3 i 5/8= 5 i 7/8
5 i 1/10 - 4 i 3/5= 5 i 1/10- 4 i 6/10= 4 i 11/10- 4 i 6/10= 5/10= 1/2
2 i 1/21 - 1 i 5/7= 2 i 1/21 - 1 i 15/21 = 1 i 22/21- 1 i 15/21= 7/21= 1/3
d) 2 i 7/9 - 1 i 1/6= 2 i 14/18 -1 i 3/18= 1 i 11/18
3 i 4/15 - 1 i 11/30= 3 i 8/30 -1 i 11/30= 2 i 38/30- 1 i 11/30= 1 i 27/30=
= 1 i 9/10
2 i 7/30- 1 i 17/20= 2 i 14/60- 1 i 51/60= 1 i 74/60- 1 i 51/60= 23/60
Szczegółowe wyjaśnienie: