January 2019 1 23 Report
1.Jacek ma 600 znaczków, z tego 2/3 to znaczki polskie. Oblicz, ile ma znaczków polskich, a ie - zagranicznych.
2. Oblicz
a) 6/13 + 7/13
5/9 + 2/3
6 3/4 + 5/12
3 5/8 + 2 1/4
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