Calculs avec fractions

a)
$A = \dfrac{5}{3}$

b)
$B = \dfrac{5}{5}$
$B = 1$

c)
$C = \dfrac{2}{4} + \dfrac{1}{4}$
$C = \dfrac{3}{4}$

d)
$D = \dfrac{5}{6} - \dfrac{4}{6}$
$D = \dfrac{1}{6}$

e)
$E = \dfrac{15}{20} + \dfrac{8}{20}$
$E = \dfrac{23}{20}$

a)
$F = \dfrac{6}{3} + \dfrac{1}{3}$
$F = \dfrac{7}{3}$

b)
$G = \dfrac{20}{5} - \dfrac{3}{5}$
$G = \dfrac{17}{5}$

c)
$H = -\dfrac{6}{6} + \dfrac{5}{6}$
$H = -\dfrac{1}{6}$

d)
$I = \dfrac{7}{2} - \dfrac{6}{2}$
$I = \dfrac{1}{2}$

e)
$J = -\dfrac{8}{4} - \dfrac{1}{4}$
$J = -\dfrac{9}{4}$

a)
$K = \dfrac{2 \times 4}{3 \times 5}$
$K = \dfrac{8}{15}$

b)
$L = \dfrac{7 \times 3}{2 \times 2 \times 7}$
$L = \dfrac{3}{4}$

c)
$M = -\dfrac{5 \times 3}{2 \times 3 \times 2 \times 5}$
$M = -\dfrac{1}{4}$

d)
$N = \dfrac{4 \times 3}{4 \times 2}$
$N = \dfrac{3}{2}$

e)
$P = -\dfrac{3 \times 5 \times 2 \times 4}{4 \times 5}$
$P = -6$

a)
$Q = \dfrac{3}{4} \times \dfrac{2}{5}$
$Q = \dfrac{6}{20}$
$Q = \dfrac{3}{10}$

b)
$R = \dfrac{7}{3} \times \dfrac{1}{2}$
$R = \dfrac{7}{6}$

c)
$S = 5 \times \dfrac{3}{10}$
$S = \dfrac{15}{10}$
$S = \dfrac{3}{2}$

d)
$T = \dfrac{-2}{5} \times \dfrac{-15}{4}$
$T = \dfrac{30}{20}$
$T = \dfrac{3}{2}$

e)
$U = \dfrac{2}{3} \times \dfrac{6}{5}$
$U = \dfrac{12}{15}$
$U = \dfrac{4}{5}$

a)
$V = \dfrac{1}{2} + \dfrac{1}{4}$
$V = \dfrac{2}{4} + \dfrac{1}{4}$
$V = \dfrac{3}{4}$

b)
$W = (\dfrac{4}{10} - \dfrac{5}{10}) \times \dfrac{5}{3}$
$W = -\dfrac{1}{10} \times \dfrac{5}{3}$
$W = -\dfrac{5}{30}$
$W = -\dfrac{1}{6}$

c)
$X = \dfrac{3}{4} - \dfrac{1}{4} \times 2$
$X = \dfrac{3}{4} - \dfrac{2}{4}$
$X = \dfrac{1}{4}$

d)
$Y = \dfrac{\dfrac{5}{6}}{\dfrac{1}{4}}$
$Y = \dfrac{5}{6} \times 4$
$Y = \dfrac{20}{6}$
$Y = \dfrac{10}{3}$

e)
$Z = 1 - \dfrac{4}{9}$
$Z = \dfrac{9}{9} - \dfrac{4}{9}$
$Z = \dfrac{5}{9}$