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Published byRafe Jenkins Modified over 9 years ago
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Activités mentales 3
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Prêt
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Question 1
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Calculez -21- (-6) x 8
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Question 2
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Calculez -100 – (- 68)
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Question 3
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(-6) 2
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Question 4
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- 3 4
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Question 5
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Calculez 10 6
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Question 6
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Calculez 9 - 2 10 5
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Question 7
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Calculez les 5 de 100 4
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Question 8
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Quel nombre convient? … : 9 = -7
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Question 9
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Calculez 50 : 0,5
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Question 10
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Trouvez x tel que x = 7 2 10
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Correction
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1) –21 – ( -6 ) x 8 =-21 +48=27
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2) –100 –( -68) = -100+68 = -32
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3) (-6) 2 =36
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4) – 3 4 = - 3x 3x 3x 3 =-81
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5) 10 6 = 1 000 000
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6) 9 - 2 = 9 - 4 = 5 = 1 10 5 10 5 10 2
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7)Les 5 de 100= 5 x 100 =5x 25 4 4 =125
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8) –63 car –63 : 9 = -7
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9) 50 : 0,5 = 50 : 1 = 50 x 2 = 100 2 ou 500 : 5 = 100
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10) x = 7 2 10 10 x x = 7 x 2 10 x x = 14 x = 14 = 1,4 10
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