Question

Oblicz. (jak coś to / jest kreska ułamkowa xd )

a) 1/2 - 3/6 =..........................

1/2 - 3/8 =........................

4/5 - 19/25 =.....................

11/18 - 5/9 = .......................

b)

2 i 2/3 - 1 i 4/5 = .................

1 i 2/6 - 2/3 = .................

2 i 1/4 - 1 i 6/8 = ................

3 i 1/3 - 2 i 10/ 15 = .....................

c)

9 i 1/2 - 3 i 5/8 = ....................

5 i 1/10 - 4 i 3/5 = ...................

2 i 1/21 - 1 i 5/7 =....................

1 i 1/5 - 39/50 =......................

d)

2 i 7/9 - 1 i 1/6 =..............

3 i 4/15 - 1 i 11/30 =............

2 i 7/30 - 1 i 17/ 20 =..............

4 i 1/100 - 2 i 3/ 50 =................

Z góry dzięki ;))

Answer 1

1/2 - 3/8 = 4/8 - 3/8 = 1/8 Rozszerzamy 1/2 to znaczy Mnozymy razy 4 licznik i

mianownik

Wytlumaczylem ;)

Dalej

1/2 - 3/6 = 3/6 - 3/6 = 0

4/5 - 19/25 = 20/25 - 19/25 = 1/25

11/18 - 5/9 = 11/18 - 10/18 = 1/18

 

Answer 2

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

11/18 - 5/9=11/18-10/18=1/18

b)2 i 2/3 - 1 i 4/5 =2i10/15-1i12/15=1i25/15-1i12/15=13/15

1 i 2/6 - 2/3 =8/6-4/6=4/6=2/3

2 i 1/4 - 1 i 6/8 =1 i 10/8-1 i 6/8=4/8=2/4=1/2

3 i 1/3 - 2 i 10/ 15 =2 i 20/15- 2 i 10/15= 10/15=2/3

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 6/8=5 i 3/4

5 i 1/10 - 4 i 3/5 =4 i 10/10- 4 i 6/10=4/10=2/5 

2 i 1/21 - 1 i 5/7 =1 i 21/21-1 i 15/21=6/21

1 i 1/5 - 39/50 =60/50-39/50=21/50

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 =2 i 38/30- 1 i 11/30=1 i 27/30

2 i 7/30 - 1 i 17/ 20 =2 i 14/60-1 i 51/60=1 i 74/60-1 i 51/60=23/50

4 i 1/100 - 2 i 3/ 50 =3 i 100/100- 2 i 6/100=1 i 94/100