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Exercice n°4. Effectuer chaque calcul en détaillant les étapes.
+80=
1. A = 5 – (-2,3) + 0,7 – 4
2. B = -0,4 +(-3,3) - (-7,1) + 1
3. C = 1,51 – 5,01 +(-3) -(-3)
4. D = (0,5 – 3) + 4 – (-1,3 – 2)
5. E = 3+(-1 - (-2)) + (7 – 13)
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A =  5 + 2.3 + 0.7 - 4

  = 8 - 4

 = 4

B = - 0.4 - 3.3 + 7.1 + 1

 = 8.1 - 3.7

 = 4.4

C = 1.51 - 5.01 - 3 + 3

= - 3.5

d = 0.5 - 3 + 4 + 1.3 + 2

 = 7.8 - 3

 = 4 .8

E = 3 - 1 + 2 + 7 - 13

 = 12 - 14

= - 2

MITCHALEXANDRINE2314

1. A = 5 – (-2,3) + 0,7 – 4

=5+2,3+0,7-4

=7,3+0,7-4

=8-4

=4

2. B = -0,4 +(-3,3) - (-7,1) + 1

=-0,4-3,3+7,1+1

=-3,7+7,1+1

=3,4+1

=4,4

3. C = 1,51 – 5,01 +(-3) -(-3)

=1,51-5,01-3+3

=-3,5-3+3

=-6,5+3

=-3,5

4. D = (0,5 – 3) + 4 – (-1,3 – 2)

=-2,5+4-(-3,3)

=1,5+3,3

=4,8

5. E = 3+(-1 - (-2)) + (7 – 13)

=3+(-1+2))+(-6)

=3+1-6

=4-6

=-2

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