Répondre :
Bonjour,
A= 11/2×3/7×14/11
A = 33/14 x 14/11
A = 462/154
A = 154 x 3 / 154 x 1
A = 3
B= (24/25-4/5) × (1/2+1/8)
B = (24/25 - 4 x 5 / 5 x 5) x (1 x 4 / 2 x 4 + 4/8)
B = (24/25 - 20/25) x (4/8 + 4/8)
B = 4/25 x 8/8
B = 4/25 x 1
B = 4/25
C= 5×2/7+12/21
C = 10/7 + 12/21
C = 10 x 3 / 7 x 3 + 12/21
C = 30/21 + 12/21
C = 42/21
C = 21 x 2 / 21 x 1
C = 2
D= 3/4+5/4×7/11
D = 3/4 + 35/44
D = 3 x 11 / 4 x 11 + 35/44
D = 33/44 + 35/44
D = 68/44
D = 4 x 17 / 4 x 11
D = 17/11
A= 11/2×3/7×14/11
A = 33/14 x 14/11
A = 462/154
A = 154 x 3 / 154 x 1
A = 3
B= (24/25-4/5) × (1/2+1/8)
B = (24/25 - 4 x 5 / 5 x 5) x (1 x 4 / 2 x 4 + 4/8)
B = (24/25 - 20/25) x (4/8 + 4/8)
B = 4/25 x 8/8
B = 4/25 x 1
B = 4/25
C= 5×2/7+12/21
C = 10/7 + 12/21
C = 10 x 3 / 7 x 3 + 12/21
C = 30/21 + 12/21
C = 42/21
C = 21 x 2 / 21 x 1
C = 2
D= 3/4+5/4×7/11
D = 3/4 + 35/44
D = 3 x 11 / 4 x 11 + 35/44
D = 33/44 + 35/44
D = 68/44
D = 4 x 17 / 4 x 11
D = 17/11
bonjour
a = 11 /2 * 3/7 * 14/11
a = 462/154
a = 3
b = ( 24/25 - 4/5) * ( 1/2 + 1/8)
b = ( 24/25 - 20/25) * ( 4/8 + 1/8)
b = 4/25 * 5/8
b = 20/ 200 = 1/10
c) 5 *2/7 + 12/21
c = 10/7 + 12/21
c = 30/21 + 12/21 = 42/21 = 2
d = 3/4 + 5/4 * 7/11
d = 3/4 + 35/44
d = 33/44 + 35/44
d = 68/44 = 17/11
a = 11 /2 * 3/7 * 14/11
a = 462/154
a = 3
b = ( 24/25 - 4/5) * ( 1/2 + 1/8)
b = ( 24/25 - 20/25) * ( 4/8 + 1/8)
b = 4/25 * 5/8
b = 20/ 200 = 1/10
c) 5 *2/7 + 12/21
c = 10/7 + 12/21
c = 30/21 + 12/21 = 42/21 = 2
d = 3/4 + 5/4 * 7/11
d = 3/4 + 35/44
d = 33/44 + 35/44
d = 68/44 = 17/11
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