Bonjour Pouvez vous m aider SVP?? (+3)-5-(-3)-6+(-2)+8= (-3)+(-10)= (+6)-(+7)= -6-28= 7-12= -12+5= (-11)-(-3)= 5/7-2/7= 3/8+13/24= 7/9x
Mathématiques
loulou2010
Question
Bonjour
Pouvez vous m aider SVP??
(+3)-5-(-3)-6+(-2)+8= (-3)+(-10)= (+6)-(+7)=
-6-28= 7-12= -12+5= (-11)-(-3)=
5/7-2/7= 3/8+13/24= 7/9x8/5= 12/77x35/30=
2/3-1/3x7/4= (27/40+1/5)x(4/7-4/21)=
Merci beaucoup...
Pouvez vous m aider SVP??
(+3)-5-(-3)-6+(-2)+8= (-3)+(-10)= (+6)-(+7)=
-6-28= 7-12= -12+5= (-11)-(-3)=
5/7-2/7= 3/8+13/24= 7/9x8/5= 12/77x35/30=
2/3-1/3x7/4= (27/40+1/5)x(4/7-4/21)=
Merci beaucoup...
1 Réponse
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1. Réponse maudmarine
(+3) - 5 - (- 3) - 6 + (- 2) + 8
= 3 - 5 + 3 - 6 - 2 + 8
= 3 + 3 + 8 -5 - 6 - 2
= 14 - 13
= 1
(- 3) + (- 10) = - 3 - 10 = - 13
(+ 6) - (+ 7) = 6 - 7 = - 1
-6 - 28 = - 34
7 - 12 = - 5
- 12 + 5 = - 7
(- 11) - (- 3) = - 11 + 3 = - 8
5/7 - 2/7 = 3/7
3/8 + 13/24
= 3 x 3 / 8 x 3 + 13/24
= 9/24 + 13/24
= 22/24
= 2 x 11 / 2 x 12
= 11/12
7/9 x 8/5 = 56/45
12/77 x 35/30
= 420/2310
= 210 x 2 / 210 x 11
= 2/11
2/3 - 1/3 x 7/4
= 2/3 - 7/12
= 2 x 4 / 3 x 4 - 7/12
= 8/12 - 7/12
= 1/12
(27/40 + 1/5) x (4/7 - 4/21)
=(27/40 + 1 x 8 / 5 x 8) x (4 x 3 / 7 x 3 - 4/21)
= (27/40 - 8/40) x (12/21 - 4/21)
= 19/40 x 8/21
= 152/840
= 8 x 19 / 8 x 105
= 19/105