Zamień działania na uł. zwykłe i oblicz 1 i 1/2 + 0,6 2 i 1/4 - 1,8 4,5 x 2 i 1/4 1,3 : 5 i 1/5
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1.![\frac{3}{2} + \frac{6}{10} = \frac{15}{10} + \frac{6}{10} = \frac{21}{10} = 2 \frac{1}{10} \frac{3}{2} + \frac{6}{10} = \frac{15}{10} + \frac{6}{10} = \frac{21}{10} = 2 \frac{1}{10}](https://tex.z-dn.net/?f=%5Cfrac%7B3%7D%7B2%7D+%2B+%5Cfrac%7B6%7D%7B10%7D+%3D+%5Cfrac%7B15%7D%7B10%7D+%2B+%5Cfrac%7B6%7D%7B10%7D+%3D+%5Cfrac%7B21%7D%7B10%7D+%3D+2+%5Cfrac%7B1%7D%7B10%7D)
2.![\frac{9}{4} - \frac{18}{10} = \frac{45}{20} - \frac{36}{20} = \frac{9}{20} \frac{9}{4} - \frac{18}{10} = \frac{45}{20} - \frac{36}{20} = \frac{9}{20}](https://tex.z-dn.net/?f=%5Cfrac%7B9%7D%7B4%7D+-+%5Cfrac%7B18%7D%7B10%7D+%3D+%5Cfrac%7B45%7D%7B20%7D+-+%5Cfrac%7B36%7D%7B20%7D+%3D+%5Cfrac%7B9%7D%7B20%7D)
3.![\frac{45}{10} * \frac{9}{4} = \frac{81}{8} = 10 \frac{1}{8} \frac{45}{10} * \frac{9}{4} = \frac{81}{8} = 10 \frac{1}{8}](https://tex.z-dn.net/?f=%5Cfrac%7B45%7D%7B10%7D+%2A+%5Cfrac%7B9%7D%7B4%7D+%3D+%5Cfrac%7B81%7D%7B8%7D+%3D+10+%5Cfrac%7B1%7D%7B8%7D)
4.![\frac{13}{10} : \frac{26}{5} = \frac{13}{10} * \frac{5}{26} = \frac{1}{4} \frac{13}{10} : \frac{26}{5} = \frac{13}{10} * \frac{5}{26} = \frac{1}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B13%7D%7B10%7D+%3A+%5Cfrac%7B26%7D%7B5%7D+%3D+%5Cfrac%7B13%7D%7B10%7D+%2A+%5Cfrac%7B5%7D%7B26%7D+%3D+%5Cfrac%7B1%7D%7B4%7D)