On donne m=1/15, n=2/5 et p=4/3 Calculer. n+p-m, m+np, 9m-np, (m+n) x p. MERCI
Mathématiques
mrpropre0059
Question
On donne m=1/15, n=2/5 et p=4/3
Calculer.
n+p-m, m+np, 9m-np, (m+n) x p.
MERCI
Calculer.
n+p-m, m+np, 9m-np, (m+n) x p.
MERCI
1 Réponse
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1. Réponse maudmarine
On donne m=1/15, n=2/5 et p=4/3 Calculer.
n+p-m
2/5 + 4/3 - 1/15
= 2 x 3 / 5 x 3 + 4 x 5 / 3 x 5 - 1/15
= 6/15 + 20/15 - 1/15
= 25/15
= 5 x 5 / 5 x 3
= 5/3
m+np
1/15 + 2/5 x 4/3
= 1/15 + 8/15
= 9/15
= 3 x 3 / 3 x 5
= 3/5
9m-np
(9 * 1/15) - (2/5 * 4/3)
= 9/15 - 5/15
= 1/15
(m+n) x p.
(1/15 + 2/5) * 4/3
= (1/15 + 2 x 3 / 5 x 3) * 4/3
= (1/15 + 6/15) * 4/3
= 7/15 * 4/3
= 28/45