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1) ![frac{2,8*0,3}{0,7} = frac{0,84}{0,7}=1,2 frac{2,8*0,3}{0,7} = frac{0,84}{0,7}=1,2](https://tex.z-dn.net/?f=+frac%7B2%2C8%2A0%2C3%7D%7B0%2C7%7D+%3D+frac%7B0%2C84%7D%7B0%2C7%7D%3D1%2C2+)
2)![frac{9,4}{4,1+5,3} = frac{9,4}{9,4} =1 frac{9,4}{4,1+5,3} = frac{9,4}{9,4} =1](https://tex.z-dn.net/?f=+frac%7B9%2C4%7D%7B4%2C1%2B5%2C3%7D+%3D+frac%7B9%2C4%7D%7B9%2C4%7D+%3D1)
3)![frac{19}{2} - frac{7}{25} = frac{475}{50} - frac{14}{50} = frac{461}{50}=9 frac{11}{50} frac{19}{2} - frac{7}{25} = frac{475}{50} - frac{14}{50} = frac{461}{50}=9 frac{11}{50}](https://tex.z-dn.net/?f=+frac%7B19%7D%7B2%7D+-+frac%7B7%7D%7B25%7D+%3D+frac%7B475%7D%7B50%7D+-+frac%7B14%7D%7B50%7D+%3D+frac%7B461%7D%7B50%7D%3D9+frac%7B11%7D%7B50%7D+)
4)![1 frac{8}{17} :( frac{12}{17} +2 frac{7}{11} )= frac{25}{17} :( frac{12}{17}+ frac{29}{11} )= frac{25}{17} :( frac{132}{187} + frac{493}{187})= frac{25}{17}: frac{625}{187} 1 frac{8}{17} :( frac{12}{17} +2 frac{7}{11} )= frac{25}{17} :( frac{12}{17}+ frac{29}{11} )= frac{25}{17} :( frac{132}{187} + frac{493}{187})= frac{25}{17}: frac{625}{187}](https://tex.z-dn.net/?f=1+frac%7B8%7D%7B17%7D+%3A%28+frac%7B12%7D%7B17%7D+%2B2+frac%7B7%7D%7B11%7D+%29%3D+frac%7B25%7D%7B17%7D+%3A%28+frac%7B12%7D%7B17%7D%2B+frac%7B29%7D%7B11%7D++%29%3D+frac%7B25%7D%7B17%7D+%3A%28+frac%7B132%7D%7B187%7D+%2B+frac%7B493%7D%7B187%7D%29%3D+frac%7B25%7D%7B17%7D%3A+frac%7B625%7D%7B187%7D+)
![= frac{25}{17}* frac{187}{625} = frac{11}{25} = frac{25}{17}* frac{187}{625} = frac{11}{25}](https://tex.z-dn.net/?f=%3D+frac%7B25%7D%7B17%7D%2A+frac%7B187%7D%7B625%7D+%3D+frac%7B11%7D%7B25%7D+)
5) 1. 2,5-![frac{9}{4} =2,5-2,25=0,25
frac{9}{4} =2,5-2,25=0,25](https://tex.z-dn.net/?f=+frac%7B9%7D%7B4%7D+%3D2%2C5-2%2C25%3D0%2C25%0A)
2. 3:54=0,055...
3.![frac{1}{2}* frac{6}{7}:1 frac{5}{7} = frac{3}{7}: frac{12}{7} = frac{3}{7}* frac{7}{12} = frac{1}{4}=0,25 frac{1}{2}* frac{6}{7}:1 frac{5}{7} = frac{3}{7}: frac{12}{7} = frac{3}{7}* frac{7}{12} = frac{1}{4}=0,25](https://tex.z-dn.net/?f=+frac%7B1%7D%7B2%7D%2A+frac%7B6%7D%7B7%7D%3A1+frac%7B5%7D%7B7%7D++%3D+frac%7B3%7D%7B7%7D%3A+frac%7B12%7D%7B7%7D+%3D+frac%7B3%7D%7B7%7D%2A+frac%7B7%7D%7B12%7D+%3D+frac%7B1%7D%7B4%7D%3D0%2C25+)
4.![frac{34}{3}-2,75:11= frac{34}{3}-0,25= frac{34}{4}- frac{1}{4}= frac{33}{4}=8,25 frac{34}{3}-2,75:11= frac{34}{3}-0,25= frac{34}{4}- frac{1}{4}= frac{33}{4}=8,25](https://tex.z-dn.net/?f=+frac%7B34%7D%7B3%7D-2%2C75%3A11%3D+frac%7B34%7D%7B3%7D-0%2C25%3D+frac%7B34%7D%7B4%7D-+frac%7B1%7D%7B4%7D%3D+frac%7B33%7D%7B4%7D%3D8%2C25++++)
ответ: 1,3
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5) 1. 2,5-
2. 3:54=0,055...
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4.
ответ: 1,3
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