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Sagot :

LOULAKAR

Bonsoir

Calculer de trois manières différentes.

a. 3/4 x 36

= 3 x 36 / 4

= 108/4

= 27

Ou

= 3 x 36/4

= 3 x (9 x 4)/4

= 3 x 9

= 27

Ou

= 0,75 x 36

= 27

b. 7/5 x 25

= 7 x 25 / 5

= 175/5

= 35

Ou

= 25/5 x 7

= 5 x 7

= 35

Ou

= 1,4 x 25

= 35

c. 5/4 x 120

= 5 x 120 / 4

= 600/4

= 150

Ou

= 120/4 x 5

= 30 x 5

= 150

Ou

= 1,25 x 120

= 150

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