RĂ©ponse :
Explications Ă©tape par Ă©tape
exercice 9
5 = (-10) x (- 1/2)
-0.1 = (-10) x 1/100
-49 = 70 x (-1/2)
-0.4 = 0.4 x (-1)
0.3 = (-1) x ( -0.3)
0 = (-2.6) x 0
-1 = 10 x (-1/10)
0.01 = 0.1 x 0.1
exercice 10
( -1) x 18 = -18
1 x (-18) = -18
(-2) x 9 = -18
2 x (-9) = -18
(-3) x 6 = -18
3 x (-6) = -18
je te laisse faire la suite sur le mĂŞme principe
exercice 8
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X - 2 - 5 - 8
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- 1 2 5 8
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3 -6 -15 -24
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- 7 14 - 35 56
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- 11 22 55 88
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20 -40 100 -160
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j'espère avoir aidé.
