Oblicz. Zapisz wszystkie działania, które wykonałeś.
1. 4 8/11 - 3 3/8 + 2 9/33 =
2. 2 3/7 + 4 3/9 - 1 12/14=
3. 6 3/5 - 4 1/3 - 2 7/30=
Ale szybko!
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1. 4 64/88 -3 33/88+2 9/33= 1 31/88+2 9/33= 1 1023/2904 +2 792/2904= 3 1815/2904= 3 5/8
2. 2 27/63 + 4 21/63 - 1 12/14= 6 48/63 -1 12/14= 6 672/882- 1 756/882=4 798/882= 4 9/21
3. 6 9/15-4 5/15-27/30= 2 4/15- 2 7/30= 2 8/30-2 7/30= 1/30