zad 1 oblicz ułamki
a) 1/4 - 1/8 + 5/6
b) 4/9 - 1/6 + 5/12
c)2/7 + 1/2 - 10/28
d) 2 2/3 - 1 9/12 + 3 10/15
e) 5 1/2 - 2 2/3 + 3 3/8
f) 17/4 - 2 1/10 + 42/40
zad.2 oblicz ułamki
a)62/4x4/13-8/15:2
b)7 1/7 : 1 11/14-1 2/5x15/18
zad.3 oblicz.:
a)4/9 liczby 63
b)7/15liczby 40
c)5 1/8 liczby 28
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ZAD1
a)1/4-1/8+5/6=6/24-3/24+20/24=3/24+20/24=23/24
b)4/9-1/6+5/12=16/36-6/36+15/36=10/36+15/36=25/36
c)2/7+1/2-10/28=8/28+14/28-10/28=22/28-10/28=12/28
d)2 2/3-1 9/12+3 10/15=2 40/60-1 45/60+3 40/60=55/60+3 40/60=3 95/60=4 35/60
e)5 1/2-2 2/3+3 3/8=5 12/24-2 16/24+3 9/24=2 20/24+3 9/24=5 29/24=6 5/24
f)17/4-2 1/10+42/40=170/40-2 4/40+42/40=86/40+42/40=128/40=3 8/10
ZAD2
a)62/4*4/13-8/15:2=62/13-8/15*1/2=62/13-4/15=930/195-52/195=878/195=4 98/195
b)7 1/7:1 11/14-1 2/5*15/18=50/7*14/25-7/5*15/18=4/1-21/18=72/18-21/18=51/18=2 15/18
ZAD3
a)4/9*63=28
b)7/15*40=18 2/3
c)5 1/8*28=41/8*28/1=143.5
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