a)
[tex]3 \frac{2}{7} = \frac{3 \times 7 + 2}{7} = \frac{21 + 2}{7 } = \frac{23}{7} [/tex]
b)
[tex]4 \frac{7}{31} = \frac{131}{31} [/tex]
stii cum am ajuns la calculul asta
c)
[tex]5 \frac{11}{78} = \frac{401}{78} [/tex]
d)
[tex]7 \frac{13}{99} = \frac{706}{99} [/tex]
e)
[tex] \frac{2}{3} \times \frac{4}{7} = \frac{8}{21} [/tex]
f)
[tex] \frac{4}{3} \times \frac{5}{11} = \frac{20}{33} [/tex]
g)
[tex] \frac{7}{10} \times \frac{3}{8} = \frac{21}{80} [/tex]
h)
[tex] \frac{4}{17} \times \frac{11}{5} = \frac{44}{85} [/tex]
sper ca te-am ajutat! ʕ •ᴥ•ʔ
Explicație pas cu pas:
[tex]a \frac{b}{ c } = \frac{a \times c + b}{c} [/tex]
[tex] \frac{a}{b} \times \frac{c}{d} = \frac{a \times c}{b \times d} [/tex]
fractiile se pot si simplifica (impartii) una cu cealalta de ex:
[tex] \frac{4}{5} \times \frac{10}{8 } [/tex]
simplifici (imparti) 4 cu 8 (8:4=2) ramane 2 in loc de 8 fiind mai mare
simplifici 5 cu 10 (10:5=2) ramane 2 in loc de 10 pt ca e mai mare
si avem
[tex] \frac{2}{2} = 1[/tex]
