Odpowiedzi

2010-02-28T18:02:48+01:00
2.1/2
3.a 29/30
b] 51/48=1 i 3/48
c]18/40=9/20
d]53/72
2010-02-28T18:06:36+01:00
1[ 2/6+1/6=1/2
3a]8/30+21/3=29/30
b]36/48+15/48=51/48
c]30/40-12/40=18/40
d]63/72-10/72=53/72
2010-02-28T18:09:12+01:00

2.⅓+⅙=2/6+⅙=3/6=⅓

3.a) 4/15+7/10=8/30+21/30=29/30
b) 9/12+5/16= 36/48+15/48=51/48=1 3/48= 1 1/16
c) 3/4-3/10= 15/20-6/20=9/20
d) 21/24-5/36=63/72-10/72=53/72