Bonjour jai besoin de faire cette exercice Voici les consignes Calculer: A=2/3+5/6 B=2/5×7/10 C=3/4×1/7 D=3×1/28​

2/3+5/6

=(4+5)/6

=9/6

=(9÷3)/(6÷3)

=3/2

2/5×7/10

=(2×7)/(5×10)

=14/50

=(14÷2)/(50÷2)

=7/25

3/4×1/7

=(3×1)/(4×7)

=3/28

3×1/28

=(3×1)/28

=3/28

Bonjour,

[tex]A = \frac{2}{3} + \frac{5}{6} = \frac{2 \times 2}{3 \times 2} + \frac{5}{6} = \frac{4 + 5}{6} = \frac{9}{6} = \frac{3 \times 3}{3 \times 2} = \frac{3}{2} [/tex]

[tex]B = \frac{2}{5} \times \frac{7}{10} = \frac{2 \times 7}{5 \times 10} = \frac{14}{50} = \frac{2 \times 7}{2 \times 25} = \frac{7}{25} [/tex]

[tex]C = \frac{3}{4} \times \frac{1}{7} = \frac{3 \times 1}{4 \times 7} = \frac{3}{28} [/tex]

[tex]D = 3 \times \frac{1}{28} = \frac{3}{1} \times \frac{1}{28} = \frac{3 \times 1}{28 \times 1} = \frac{3}{28} [/tex]