1.Oblicz 8/15 :
3 1/3=
8 2/5 : 13/15=
2 3/4 : 3 2/3=
1 5/6 : 1 1/10=
2. Jacek ma 600 znaczków z tego 2/3 to znaczki polskie.Ile ma znaczków polskich, a ile zagranicznych?
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Zad 1
8/15 :3 1/3 = 8/15 : 10/3 = 5/15 * 3/10 = 1/10 = 0,1
8 2/5 : 13/15 = 42/5 * 15/13 = 126/13 = 9 9/13
2 3/4 : 3 2/3 = 11/4 : 11/4 = 11/4 * 4/11 = 1
1 5/6 : 1 1/10 = 11/6 * 10/11 = 10/6 = 5/3 = 1 2/3
zad 2
600 * 2/3 = 1200/3 = 400 - znaczki polskie
600 - 400 = 200 - znaczki zagraniczne