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2/3*3/2=1
=28/5*5/28=1
=7 1/3*2/3*3/2=7 1/3
2)
=5/24*12/5=1/2
=77/9*45/14*14/15=skracam=77/3 musisz zannaczyć ,że skracasz
=31/3*45/8*8/9=skracasz 8z 8, potem45 z9=155/3= wyciągaj całości=
=120/5*35/11*22/49=po skróceniu 1680/49=34 i 14/49
= 8/7*21/4*2=8/7*21/4*2=12 po skróceniu
=26/5*1/2*25/22=65/22=2 i 21/22