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résolu

Bonsoir à tous et à toute : J'ai des exercices de maths :

Priorités et calculs Fractionnaire:

A =3/2 + 4/5
B =13/15 - 3/5
C =35/4 × - 28/5
D =7/10 : 3/5

E =( 12/7 + 8/7 ) × 4/5
F = 5/8 × (3/4 + 7/4 )
G = 7 × (3 + 5/7 )

H = ( 1/2 + 3/4 ): 2/3
I = ( 12/7 + 8/7 ): (7/5 - 1/5 )
J = 1 - (1/6 + 5/12 )

K = 2/3 × 7/5 - 4/125
L = 3/4 : 4/5 + 7/2
M = 1/2 + 5/2 × 7/10

N = 4/7 + 15/7 : 5/2
O = 1 - 5/2 × 4/15
P = 2/7 + 5/14 × ( 2/3 + 1/3 )

Répondre :

CROISIERFAMILYVIZ

A = 3/2 + 4/5 = 15/10 + 8/10 = 23/10

B = 13/15 - 9/15 = 4/15

C = 35/4 x (-28/5) = -7/4 x 28 = -7 x 7 = -49

D = 7/10 x 5/3 = 7/2 x 1/3 = 7/6

E = 20/7 x 4/5 = 4/7 x 4 = 16/7

F = 5/8 x 10/4 = 5/8 x 5/2 = 25/16

G = 7 x ( 21/7 + 5/7 ) = 7 x 26/7 = 26

H = ( 2/4 + 3/4 ) x 3/2 = 5/4 x 3/2 = 15/8

I = 20/7 x 5/6 = 10/7 x 5/3 = 50/21

J = 12/12 - 2/12 - 5/12 = 12/12 - 7/12 = 5/12

K = 14/15 - 4/125 = 350/375 - 12/375 = 338/375

L = 3/4 x 5/4 + 7/2 = 15/16 + 7/2 = 15/16 + 56/16 = 71/16

M = 1/2 + 5/2 x 7/10 = 1/2 + 1/2 x 7/2 = 2/4 + 7/4 = 9/4

N = 4/7 + 15/7 x 2/5 = 4/7 + 3/7 x 2 = 4/7 + 6/7 = 10/7

O = 1 - 1/2 x 4/3 = 1  - 2/3 = 3/3 - 2/3 = 1/3

P = 2/7 + 5/14 x 1 = 4/14 + 5/14 = 9/14

LOULAKARVIZ

Bonsoir,

Priorités et calculs Fractionnaires :

A =3/2 + 4/5

A = (3 x 5)/(2 x 5) + (4 x 2)/(5 x 2)

A = 15/10 + 8/10

A = 23/10


B =13/15 - 3/5

B = 13/15 - (3 x 3)/(3 x 5)

B = 13/15 - 9/15

B = 4/15


C =35/4 × - 28/5

C = 35/5 x -28/4

C = 7 x -7

C = -49


D =7/10 : 3/5

D = 7/10 x 5/3

D = 5/10 x 7/3

D = 1/2 x 7/3

D = 7/6


E =( 12/7 + 8/7 ) × 4/5

E = 20/7 x 4/5

E = 20/5 x 4/7

E = 4 x 4/7

E = 16/7


F = 5/8 × (3/4 + 7/4 )

F = 5/8 x 10/4

F = 5/8 x 5/2

F = 25/16


G = 7 × (3 + 5/7 )

G = 7 x (21/7 + 5/7)

G = 7 x 26/7

G = 26


H = ( 1/2 + 3/4 ): 2/3

H = (2/4 + 3/4) x 3/2

H = 5/4 x 3/2

H = 15/8


I = ( 12/7 + 8/7 ): (7/5 - 1/5 )

I = 20/7 : (6/5)

I = 20/7 x 5/6

I = 20/6 x 5/7

I = 10/3 x 5/7

I = 50/21


J = 1 - (1/6 + 5/12 )

J = 1 - (2/12 + 5/12)

J = 12/12 - 7/12

J = 5/12


K = 2/3 × 7/5 - 4/125

K = 14/15 - 4/125

K = 350/375 - 12/375

K = 338/375


L = 3/4 : 4/5 + 7/2

L = 3/4 x 5/4 + 56/16

L = 15/16 + 56/16

L = 71/16


M = 1/2 + 5/2 × 7/10

M = 2/4 + 7/4

M = 9/4


N = 4/7 + 15/7 : 5/2

N = 4/7 + 15/7 x 2/5

N = 4/7 + 6/7

N = 10/7


O = 1 - 5/2 × 4/15

O = 1 - 2/3

O = 3/3 - 2/3

O = 1/3


P = 2/7 + 5/14 × ( 2/3 + 1/3 )

P = 2/7 + 5/14 x 3/3

P = 4/14 + 5/14

P = 9/14

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