Question

1-simplifique as fraçoes :
A)3/18=
B)-12/15=
C)55/66=
2-represente na reta os pontos:
A)-3/5
B)+3/4
3-calcule:
A)-4/3 + 5/3=
B)-1/4 - 2/4=
C)6/2 + 3/4 =
D)4/2 ×4/6=
E)1/5 : 2/6 =
F)4/3 : 6/2

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Answer 1

$\boxed{\begin{array}{l}\rm 1)\\\tt a)~\sf\dfrac{3\div3}{18\div3}=\dfrac{1}{6}\\\tt b)~\sf\dfrac{12\div3}{15\div3}=\dfrac{4}{5}\\\tt c)~\sf\dfrac{55\div11}{66\div11}=\dfrac{5}{6}\\\rm 2)\\\sf a~representac_{\!\!,}\tilde ao~est\acute a~anexa\\\rm 3)\\\tt a)~\sf\dfrac{4}{3}+\dfrac{5}{3}=\dfrac{9}{3}=3\\\tt b)~\sf\dfrac{1}{4}-\dfrac{2}{4}=-\dfrac{1}{4}\\\tt c)~\sf\dfrac{6}{2}+\dfrac{3}{4}=\dfrac{12+3}{4}=\dfrac{15}{4}\\\tt d)~\sf\dfrac{4}{2}\cdot\dfrac{4}{6}=\dfrac{16\div4}{12\div4}=\dfrac{4}{3}\\\tt e)~\sf\dfrac{1}{5}\div\dfrac{2}{6}=\dfrac{1}{5}\cdot\dfrac{6}{2}=\dfrac{6\div2}{10\div2}=\dfrac{3}{5}\\\tt f)~\sf\dfrac{4}{3}\div\dfrac{6}{2}=\dfrac{4}{3}\cdot\dfrac{2}{6}=\dfrac{8\div2}{18\div2}=\dfrac{4}{9}\end{array}}$