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Sagot :

AYUDA

bjr

5/4 + (-3/4) = 5/4 - 3/4 = 2/4 = 1/2

-1/8 + (-3/4) = -1/8 - 6/8 = -7/8

-1/8 + ? = 5/4

? = 5/4 + 1/8 = 10/8 + 1/8 = 11/8

donc sous le -3/4 colonne de gauche, il y aura 11/8

et

5/4 + 11/8 = 10/8 + 11/8 = 21/8

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