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Mrslopez
@Mrslopez
January 2021
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Bonjour,
Pouvez vous m'aider?
Je n'arrive pas a ces question:
Calcule les sommes algébriques suivantes :
a. – 3 + (– 23) + 7 – (– 5) + 3
b. – 7 + 4,5 – 25 + 20,5
c. 17 – (29 – 40) + (– 16) + 5
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maudmarine
Verified answer
Bonjour,
a. – 3 + (– 23) + 7 – (– 5) + 3
= - 3 - 23 + 7 + 5 + 3
= - 26 + 15
= - 11
b. – 7 + 4,5 – 25 + 20,5
= - 7 - 25 + 4,5 + 20,5
= - 32 + 25
= - 7
c. 17 – (29 – 40) + (– 16) + 5
= 17 - (- 11) - 16 + 5
= 17 + 11 - 16 + 5
= 17 + 11 + 5 - 16
= 33 - 16
= 17
14 votes
Thanks 20
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CC ! qui pourait m'aider? 1) 10^....< 3,27 x 10^11 < 10^... 2) 10^...< 87 x 10^3 < 10^.... Merciiii beaucoup;
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Verified answer
Bonjour,a. – 3 + (– 23) + 7 – (– 5) + 3
= - 3 - 23 + 7 + 5 + 3
= - 26 + 15
= - 11
b. – 7 + 4,5 – 25 + 20,5
= - 7 - 25 + 4,5 + 20,5
= - 32 + 25
= - 7
c. 17 – (29 – 40) + (– 16) + 5
= 17 - (- 11) - 16 + 5
= 17 + 11 - 16 + 5
= 17 + 11 + 5 - 16
= 33 - 16
= 17