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18/30 и 15/18
![\frac{15}{18} = \frac{3 \times 5}{6 \times 3} = \frac{5}{6} = \frac{5 \times 5}{6 \times6} = \frac{25}{30} \\ \frac{25}{30} = \frac{18}{30} \\ \\ \frac{15}{18} = \frac{3 \times 5}{6 \times 3} = \frac{5}{6} = \frac{5 \times 5}{6 \times6} = \frac{25}{30} \\ \frac{25}{30} = \frac{18}{30} \\ \\](https://tex.z-dn.net/?f=+%5Cfrac%7B15%7D%7B18%7D+%3D+%5Cfrac%7B3+%5Ctimes+5%7D%7B6+%5Ctimes+3%7D+%3D+%5Cfrac%7B5%7D%7B6%7D+%3D+%5Cfrac%7B5+%5Ctimes+5%7D%7B6+%5Ctimes6%7D+%3D+%5Cfrac%7B25%7D%7B30%7D+%5C%5C+%5Cfrac%7B25%7D%7B30%7D+%3D+%5Cfrac%7B18%7D%7B30%7D+%5C%5C+%5C%5C+)
28/40 и 10/45
![\frac{28}{40} = \frac{7 \times 4}{4 \times 10} = \frac{7}{10} = \frac{7}{5 \times 2} = \frac{7 \times 9}{5 \times 2 \times 9} = \frac{63}{90} \\ \frac{10}{45} = \frac{5 \times 2}{9 \times 5} = \frac{5 \times 2 \times 2}{9 \times 5 \times 2} = \frac{20}{90} \frac{28}{40} = \frac{7 \times 4}{4 \times 10} = \frac{7}{10} = \frac{7}{5 \times 2} = \frac{7 \times 9}{5 \times 2 \times 9} = \frac{63}{90} \\ \frac{10}{45} = \frac{5 \times 2}{9 \times 5} = \frac{5 \times 2 \times 2}{9 \times 5 \times 2} = \frac{20}{90}](https://tex.z-dn.net/?f=+%5Cfrac%7B28%7D%7B40%7D+%3D+%5Cfrac%7B7+%5Ctimes+4%7D%7B4+%5Ctimes+10%7D+%3D+%5Cfrac%7B7%7D%7B10%7D+%3D+%5Cfrac%7B7%7D%7B5+%5Ctimes+2%7D+%3D+%5Cfrac%7B7+%5Ctimes+9%7D%7B5+%5Ctimes+2+%5Ctimes+9%7D+%3D+%5Cfrac%7B63%7D%7B90%7D+%5C%5C+%5Cfrac%7B10%7D%7B45%7D+%3D+%5Cfrac%7B5+%5Ctimes+2%7D%7B9+%5Ctimes+5%7D+%3D+%5Cfrac%7B5+%5Ctimes+2+%5Ctimes+2%7D%7B9+%5Ctimes+5+%5Ctimes+2%7D+%3D+%5Cfrac%7B20%7D%7B90%7D+)
49/105 и 27/36
![\frac{49}{105} = \frac{7 \times 7}{5 \times 3 \times 7} = \frac{7}{5 \times 3} = \frac{7 \times 4}{ 5\times 3 \times 4} = \frac{28}{60} \\ \frac{27}{36} = \frac{9 \times 3}{4 \times 3 \times 3} = \frac{9}{4 \times 3} = \frac{9 \times 5}{4 \times 3 \times 5} = \frac{45}{60} \frac{49}{105} = \frac{7 \times 7}{5 \times 3 \times 7} = \frac{7}{5 \times 3} = \frac{7 \times 4}{ 5\times 3 \times 4} = \frac{28}{60} \\ \frac{27}{36} = \frac{9 \times 3}{4 \times 3 \times 3} = \frac{9}{4 \times 3} = \frac{9 \times 5}{4 \times 3 \times 5} = \frac{45}{60}](https://tex.z-dn.net/?f=+%5Cfrac%7B49%7D%7B105%7D+%3D+%5Cfrac%7B7+%5Ctimes+7%7D%7B5+%5Ctimes+3+%5Ctimes+7%7D+%3D+%5Cfrac%7B7%7D%7B5+%5Ctimes+3%7D+%3D+%5Cfrac%7B7+%5Ctimes+4%7D%7B+5%5Ctimes+3+%5Ctimes+4%7D+%3D+%5Cfrac%7B28%7D%7B60%7D+%5C%5C+%5Cfrac%7B27%7D%7B36%7D+%3D+%5Cfrac%7B9+%5Ctimes+3%7D%7B4+%5Ctimes+3+%5Ctimes+3%7D+%3D+%5Cfrac%7B9%7D%7B4+%5Ctimes+3%7D+%3D+%5Cfrac%7B9+%5Ctimes+5%7D%7B4+%5Ctimes+3+%5Ctimes+5%7D+%3D+%5Cfrac%7B45%7D%7B60%7D+)
60/90 и 15/50
![\frac{60}{90} = \frac{3 \times 2 \times 10}{3 \times 3 \times 10} = \frac{2 \times 10}{3 \times 10} = \frac{20}{30} \\ \frac{15}{50} = \frac{5 \times 3}{5 \times 10} = \frac{3}{10} = \frac{3 \times 3}{10 \times 3} = \frac{9}{30} \frac{60}{90} = \frac{3 \times 2 \times 10}{3 \times 3 \times 10} = \frac{2 \times 10}{3 \times 10} = \frac{20}{30} \\ \frac{15}{50} = \frac{5 \times 3}{5 \times 10} = \frac{3}{10} = \frac{3 \times 3}{10 \times 3} = \frac{9}{30}](https://tex.z-dn.net/?f=+%5Cfrac%7B60%7D%7B90%7D+%3D+%5Cfrac%7B3+%5Ctimes+2+%5Ctimes+10%7D%7B3+%5Ctimes+3+%5Ctimes+10%7D+%3D+%5Cfrac%7B2+%5Ctimes+10%7D%7B3+%5Ctimes+10%7D+%3D+%5Cfrac%7B20%7D%7B30%7D+%5C%5C+%5Cfrac%7B15%7D%7B50%7D+%3D+%5Cfrac%7B5+%5Ctimes+3%7D%7B5+%5Ctimes+10%7D+%3D+%5Cfrac%7B3%7D%7B10%7D+%3D+%5Cfrac%7B3+%5Ctimes+3%7D%7B10+%5Ctimes+3%7D+%3D+%5Cfrac%7B9%7D%7B30%7D+)
10/20 8/24 и 9/45
![\frac{10}{20} = \frac{10}{2 \times 10} = \frac{1}{2} = \frac{5 \times 3}{5 \times 2 \times 3} = \frac{15}{30} \\ \frac{8}{24} = \frac{8}{3 \times 8} = \frac{1}{3} = \frac{5 \times 2}{5 \times 2 \times 3} = \frac{10}{30} \\ \frac{9}{45} = \frac{9}{9 \times 5} = \frac{1}{5} = \frac{2 \times 3}{5 \times 2 \times 3} = \frac{6}{30} \frac{10}{20} = \frac{10}{2 \times 10} = \frac{1}{2} = \frac{5 \times 3}{5 \times 2 \times 3} = \frac{15}{30} \\ \frac{8}{24} = \frac{8}{3 \times 8} = \frac{1}{3} = \frac{5 \times 2}{5 \times 2 \times 3} = \frac{10}{30} \\ \frac{9}{45} = \frac{9}{9 \times 5} = \frac{1}{5} = \frac{2 \times 3}{5 \times 2 \times 3} = \frac{6}{30}](https://tex.z-dn.net/?f=+%5Cfrac%7B10%7D%7B20%7D+%3D+%5Cfrac%7B10%7D%7B2+%5Ctimes+10%7D+%3D+%5Cfrac%7B1%7D%7B2%7D+%3D+%5Cfrac%7B5+%5Ctimes+3%7D%7B5+%5Ctimes+2+%5Ctimes+3%7D+%3D+%5Cfrac%7B15%7D%7B30%7D+%5C%5C+%5Cfrac%7B8%7D%7B24%7D+%3D+%5Cfrac%7B8%7D%7B3+%5Ctimes+8%7D+%3D+%5Cfrac%7B1%7D%7B3%7D+%3D+%5Cfrac%7B5+%5Ctimes+2%7D%7B5+%5Ctimes+2+%5Ctimes+3%7D+%3D+%5Cfrac%7B10%7D%7B30%7D+%5C%5C+%5Cfrac%7B9%7D%7B45%7D+%3D+%5Cfrac%7B9%7D%7B9+%5Ctimes+5%7D+%3D+%5Cfrac%7B1%7D%7B5%7D+%3D+%5Cfrac%7B2+%5Ctimes+3%7D%7B5+%5Ctimes+2+%5Ctimes+3%7D+%3D+%5Cfrac%7B6%7D%7B30%7D+)
6) извини, у меня глаза болят, не смогу(
28/40 и 10/45
49/105 и 27/36
60/90 и 15/50
10/20 8/24 и 9/45
6) извини, у меня глаза болят, не смогу(
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