Explicație pas cu pas:
[tex] 2.\frac{13}{8} + \frac{2}{8} - \frac{5}{8} = \frac{15}{8} - \frac{5}{8} = \frac{10}{8} [/tex]
[tex]3. \frac{31}{17} = \frac{62}{x - 2} [/tex]
x=17×2+2=34+2=36
[tex] \frac{31}{17} = \frac{62}{36 - 2} \div 2[/tex]
[tex] \frac{31}{17} = \frac{62 \div 2}{(36 - 2) \div 2} [/tex]
[tex] \frac{31}{17} = \frac{31}{17} [/tex]
[tex]4.a) \frac{5}{27} + \frac{1}{27} = \frac{6}{27} [/tex]
[tex]4.b) \frac{27}{27} - ( \frac{5}{27} + \frac{5}{27} + \frac{1}{27} + \frac{1}{27} )[/tex]
[tex] \frac{27}{27} - \frac{12}{27} = \frac{15}{27} [/tex]
[tex] \frac{5}{27} + \frac{1}{27} = a \: doua \: luna[/tex]
