Oblicz: kreską ułamkową jest to / a kodzielić to dwie kropki czli : 1/2 +1/3 = ,1/3 + 1/9 = ,3/2-1/2 = , 9/8 - 4/4 = , 5/8 * 16/15 = , 20/10 * 30/15 = , 3/12 : 4 = , 16/4 : 1/2 = Z góry dziękuje i daje naj ;P
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1/2+1/3= 3/6+2/6= 5/6
1/3+1/9= 3/9+1/9=4/9
3/2-1/2=2/2=1
9/8-4/4= 9/8-2/8=7/8
5/8*16/15=80/120
20/10*30/15=2*2=4
3/12:4= 3/12*1/4=3/48
16/4:1/2=4*1=4