Odpowiedź:
1.
[tex] \frac{2}{4} + \frac{2}{4} = \frac{4}{4} = 1[/tex]
[tex] \frac{2}{4} + \frac{3}{4} = \frac{5}{4} = 1 \frac{1}{4} [/tex]
[tex] \frac{2}{4} + \frac{4}{4} = \frac{6}{4} = 1 \frac{2}{4} = 1 \frac{1}{2} [/tex]
[tex] \frac{2}{4} + \frac{5}{4} = \frac{7}{4} = 1 \frac{3}{4} [/tex]
2/4+6/4=8/4=2
2/4+ 7/4=9/4=2 1/4
2/4+8/4=10/4=2 2/4=2 1/2
2/4+9/4=11/4=2 3/4
2.
5/5-3/5=3/5
6/5-3/5=3/5
7/5-3/5=3/5
8/5- 3/5= 5/5=1
1-3/5=2/5
1 1/5-3/5=3/5
1 2/5-3/5=4/5
1 3/5-3/5=1
3.
4/5+3/5= 7/5=1 2/5
3/7+5/7=8/7=1 1/7
1 3/4+ 1 1/4=2 4/4=3
4.
3/10+3/10=6/10=3/5
1/9+2/9=3/9=1/3
1/10+7/10=8/10=4/5
4/15+2/15=6/15= 2/5
4/7+2/7=6/7
5/9+ 8/9=13/9=1 4/9
3/4+3/4=6/4=1 2/4=1 1/2
3/8+7/8=10/8=1 2/8 = 1 1/4
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