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Published byMakayla Alvarez Modified over 11 years ago
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ACTIVITES MENTALES Collège Jean Monnet Préparez-vous !
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Calculer : 18 – 21 ÷ 7 + 9 × 4 Question 1
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Question 2 Peut-on construire un triangle MNO tel que : MO = 6 cm MN = 10 cm et ON = 14 cm ?
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Question 3 Calculer : (-9) – (+8)
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Dessiner la médiatrice de [AB]. Question 4 A B x x
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Question 5 Calculer : 60 10 + 2
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Correction
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Calculer : 18 – 21 ÷ 7 + 9 × 4 = 18 – 3 + 36 = 15 + 36 = 51 Question 1
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Question 2 ON = 14 cm MO+MN = 10+6 = 16 cm ON < MO + MN donc on peut construire le triangle MNO.
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Question 3 Calculer : (-9) – (+8) = (-9) + (-8) = -17
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Dessiner la médiatrice de [AB]. Question 4 A B x x
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Question 5 Calculer : 60 10 + 2 = 5
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FIN !
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