January 2019 1 2 Report
1.OBLICZ WEDŁUG WZORU.WZÓR:1 4/7+5/7=1 9/7=2 2/7

a)1 2/7+3/7=
2 5/8+3/8=
1 3/5+2 4/5=

b)2 7/8 - 4/8=
3 9/11 - 1 7/11=
3 3/4 - 1 1/4=
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