Klasa 5. Są tam tabelki ,ale ja wam napisze działania :) :
4/9 + 7/8
4/9+ 2/5
6/7 + 2/5
6/7 +7/8
10/11-2/3
10/11-3/4
13/15-2/3
13/15-3/4
Dziękuję :)
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4/9+7/8=32/72+63/72=95/72=123/72
4/9+2/5=20/45+18/45=38/45
6/7+2/5=30/35+14/35=44/35=1 9/35
6/7+7/8=48/56+49/56=97/56=1 41/56
10/11-2/3=30/33-22/33=8/33
10/11-3/4=40/44-33/44=7/44
13/15-2/3=13/15-10/15=3/15=1/5
32/72+63/72= 95/72= 123/72
20/45+18/45= 38/45
30/35+14/35= 44/35= 1 i 9/35
48/56+49/56= 97/56= 1 i 41/56
30/33-22/33= 8/33
40/44-33/44= 7/44
13/15-10/15= 3/15= 1/5