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Published byGeorgia Freeman Modified over 9 years ago
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Activités mentales 1
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Prêt
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Question 1
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Calculez -4 + (-5) x 3
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Question 2
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Calculez 9 x 8 – 6 x7
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Question 3
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(-3) 2
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Question 4
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- 5 2
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Question 5
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Calculez 10 4
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Question 6
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Calculez 1 + 5 3 9
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Question 7
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Calculez les 2 de 21 3
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Question 8
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Calculez les 4 de 3 3 5
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Question 9
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Calculez 4 : 0,5
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Question 10
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Calculez 98 x 0,1
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Correction
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1) -4 + (-5) x 3 =-4-15 =-19
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2) 9 x 8 – 6 x7 = 72-42=30
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3) (-3) 2 = (-3) x (-3) = 9
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4) -5 2 = - 5 x 5 = - 25
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5) 10 4 = 10 x 10 x 10 x 10 = 10 000
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6) 1 + 5 = 3 + 5 =8 3 9 9 9 9
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7) Calculez les 2 de 21 3 2 x 21 = 42 = 14 3 3
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8) les 4 de 3 = 4 x 3 = 4 3 5 3 5 5
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9) 4 : 0,5 = 4 :1 = 4 x 2 = 8 2
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10) 98 x 0,1= 9,8
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