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Sagot :

° Exercice 1 :

a. [tex]\frac{5}{10}[/tex] + [tex]\frac{6}{10}[/tex] = [tex]\frac{5+6}{10}[/tex] = [tex]\frac{11}{10}[/tex]

b. [tex]\frac{1}{100}[/tex] + [tex]\frac{2}{100}[/tex] = [tex]\frac{1+2}{100}[/tex] = [tex]\frac{3}{100}[/tex]

c. [tex]\frac{7}{8}[/tex] + [tex]\frac{7,4}{8}[/tex] = [tex]\frac{7+7,4}{8}[/tex]= [tex]\frac{14,4}{8}[/tex]

d. [tex]\frac{1}{6}[/tex] + [tex]\frac{5}{6}[/tex] = [tex]\frac{1+5}{6}[/tex] = [tex]\frac{6}{6}[/tex] = 1

° Exercice 2 :

A = [tex]\frac{1}{2}[/tex] + [tex]\frac{1}{4}[/tex]  

° [tex]\frac{1}{2}[/tex] = [tex]\frac{1*2}{2*2}[/tex] = [tex]\frac{2}{4}[/tex] ==> [tex]\frac{2}{4}[/tex] + [tex]\frac{1}{4}[/tex] = [tex]\frac{2+1}{4}[/tex] = [tex]\frac{3}{4}[/tex]

B = [tex]\frac{1}{2}[/tex] + [tex]\frac{5}{6}[/tex]

° [tex]\frac{1}{2}[/tex] = [tex]\frac{1*3}{2*3}[/tex] = [tex]\frac{3}{6}[/tex] ==> [tex]\frac{3}{6}[/tex] + [tex]\frac{5}{6}[/tex] = [tex]\frac{3+5}{6}[/tex] = [tex]\frac{8}{6}[/tex]

F = [tex]\frac{7}{12}[/tex] + [tex]\frac{5}{3}[/tex]

° [tex]\frac{5}{3}[/tex] = [tex]\frac{5*4}{3*4}[/tex] = [tex]\frac{20}{12}[/tex] ==> [tex]\frac{7}{12}[/tex] + [tex]\frac{20}{12}[/tex] = [tex]\frac{7+20}{12}[/tex] = [tex]\frac{27}{12}[/tex]

G = 2 + [tex]\frac{1}{3}[/tex]

° 2 = [tex]\frac{3*2}{3}[/tex] = [tex]\frac{6}{3}[/tex] ==> [tex]\frac{6}{3}[/tex] + [tex]\frac{1}{3}[/tex] = [tex]\frac{6+1}{3}[/tex] = [tex]\frac{7}{3}[/tex]

C = [tex]\frac{10}{3}[/tex] + [tex]\frac{5}{6}[/tex] + [tex]\frac{19}{12}[/tex]

° [tex]\frac{10}{3}[/tex] = [tex]\frac{10*4}{3*4}[/tex] =[tex]\frac{40}{12}[/tex]      

° [tex]\frac{5}{6}[/tex] = [tex]\frac{5*2}{6*2}[/tex] = [tex]\frac{10}{12}[/tex]

''===> [tex]\frac{40}{12}[/tex] + [tex]\frac{10}{12}[/tex] + [tex]\frac{19}{12}[/tex] = [tex]\frac{40+10+19}{12}[/tex] = [tex]\frac{69}{12}[/tex]

D = [tex]\frac{5}{2}[/tex] + [tex]\frac{11}{18}[/tex] + [tex]\frac{5}{3}[/tex]

° [tex]\frac{5}{2}[/tex] = [tex]\frac{5*9}{2*9}[/tex] = [tex]\frac{45}{18}[/tex]

° [tex]\frac{5}{3}[/tex] = [tex]\frac{5*6}{3*6}[/tex] = [tex]\frac{30}{18}[/tex]

"===> [tex]\frac{45}{18}[/tex] + [tex]\frac{11}{18}[/tex] + [tex]\frac{30}{18}[/tex] = [tex]\frac{45+11+30}{18}[/tex] = [tex]\frac{86}{18}[/tex]

Désolé, je 'est pas le temps de tout faire.

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