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Robert504
@Robert504
May 2019
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Bonjour j’ai vraiment besoin d’aide
Il faut effectuer les calculs suivant
M= 2-2 x 7/5
N=8 x (1/6 - 1/3)
R=(1/2 - 1/4) x (1+1/3)
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swnn
Verified answer
M = 2-2 * 7/5
M = 2 - 14/5
M = (5*2)/(5*1) - 14/5
M = 10/5 - 14/5
M = -4/5
N = 8*(1/6 - 1/3)
N = 8*(1/6 - 2/6)
N = 8*(-1/6)
N = -8/6
→ simplification par 2
N = -4/3
R = (1/2 - 1/4) * (1+1/3)
R = (2/4 - 1/4) * (3/3 + 1/3)
R = 1/4 * 4/3
→ simplification par 4
R = 1/3
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FamilyS
Verified answer
Bonsoir,
M = 2 - 2 × 7/5
On effectue la multiplication d'abord ( règles de priorité ).
2 × 7/5 = 2/1 × 7/5 = 14/5
M = 2/1 - 14/5
M = 10/5 - 14/5
M = (-4)/5
N = 8 × ( 1/6 - 1/3 )
On effectue d'abord le calcul entre parenthèses.
1/6 - 1/3 = 1/6 - 2/6 = (-1)/6
N = 8/1 × (-1)/6
N = (-8)/6 = (-8 ÷ 2 ) / ( 6 ÷ 2 ) = (-4)/3
R = ( 1/2 - 1/4 ) × ( 1 + 1/3 )
On effectue d'abord les calculs entre parenthèses puis la multiplication.
1/2 - 1/4 = 2/4 - 1/4 = 1/4
1/1 + 1/3 = 3/3 + 1/3 = 4/3
R = 1/4 × 4/3
R = 4/12 = ( 4 ÷ 4 ) / ( 12 ÷ 4 ) = 1/3
Bonne journée ! :-)
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Verified answer
M = 2-2 * 7/5M = 2 - 14/5
M = (5*2)/(5*1) - 14/5
M = 10/5 - 14/5
M = -4/5
N = 8*(1/6 - 1/3)
N = 8*(1/6 - 2/6)
N = 8*(-1/6)
N = -8/6
→ simplification par 2
N = -4/3
R = (1/2 - 1/4) * (1+1/3)
R = (2/4 - 1/4) * (3/3 + 1/3)
R = 1/4 * 4/3
→ simplification par 4
R = 1/3
Verified answer
Bonsoir,M = 2 - 2 × 7/5
On effectue la multiplication d'abord ( règles de priorité ).
2 × 7/5 = 2/1 × 7/5 = 14/5
M = 2/1 - 14/5
M = 10/5 - 14/5
M = (-4)/5
N = 8 × ( 1/6 - 1/3 )
On effectue d'abord le calcul entre parenthèses.
1/6 - 1/3 = 1/6 - 2/6 = (-1)/6
N = 8/1 × (-1)/6
N = (-8)/6 = (-8 ÷ 2 ) / ( 6 ÷ 2 ) = (-4)/3
R = ( 1/2 - 1/4 ) × ( 1 + 1/3 )
On effectue d'abord les calculs entre parenthèses puis la multiplication.
1/2 - 1/4 = 2/4 - 1/4 = 1/4
1/1 + 1/3 = 3/3 + 1/3 = 4/3
R = 1/4 × 4/3
R = 4/12 = ( 4 ÷ 4 ) / ( 12 ÷ 4 ) = 1/3
Bonne journée ! :-)