Question

Zad 2
a)1/4 + 1/5
b)2/3 + 5/7
c)1 1/10 + 5 4/5
d)5/6 + 3 11/12
e)1/4 + 1/5 + 3/10
f)5+7 8/9 + 4 1/2
Zad 3
a)11/12 - 4/12
b)20 - 3/7
c)14 2/5 - 3/5
d)32 - 4 5/6
e)85 10/11 - 26 /11
f)27 3/8 - 19 5/8

Answer 1

Zad. 2
a) 1/4 + 1/5 = 5/20 + 4/20 = 9/20
b) 2/3 + 5/7 = 14/21 + 15/21 = 29/21 = 1 8/21
c) 1 1/10 + 5 4/5 = 1 1/10 + 5 8/10 = 6 9/10
d) 5/6 + 3 11/12 = 10/12 + 3 11/12 = 3 22/12 = 4 10/12 = 4 5/6
e) 1/4 + 1/5 + 3/10 = 5/20 + 4/20 + 6/20 = 15/20 = 3/4
f) 5 + 7 8/9 + 4 1/2 = 5 + 7 16/18 + 4 9/18 = 16 25/18 = 17 7/18

zad. 3
a) 11/12 - 4/12 = 7/12
b) 20 - 3/7 = 19 7/7 - 2/7 = 19 5/7
c) 14 2/5 - 3/5 = 13 7/5 - 3/5 = 13 4/5
d) 32 - 4 5/6 = 31 6/6 - 4 5/6 = 27 1/6
e) 85 10/11 - 26/11 = 83 32/11 - 26/11 = 57 6/11
f) 27 3/8 - 19 5/8 = 26 11/8 - 19 5/8 = 7 6/8 = 7 3/4

Answer 2

A)=5/20+4/20=9/20
b)=14/21+15/21=29/21=1 8/21
c)=11/10+29/5=11/10+58/10=69/10=6 9/10
d)=5/6+47/12=10/12+47/12=57/12=4 9/12=4 3/4
e)=5/20+4/20+6/20=15/20=3/4
f)=5/1+71/9+9/2=90/18+142/18+81/18=313/18=17 7/18

zad3
a)=7/12
b)=140/7-3/7=137/7=19 4/7
c)=72/5-3/5=69/5=13 4/5
d)=32-29/6=192/6-29/6=163/6=27 1/6
e)=945/11-26/11=919/11=83 6/11
f)=219/8-157/8=62/8=7 6/8=7 3/4