December 2020 1 58 Report
16 Calculer mentalement.
a. 17 + 28
b.-4+ 15
c.-9+(-6)
d. 12+(-34)
e. - 40 + 25
f.-22+(-51)
17 Calculer mentalement.
a.7+(-12)+4 b.-6+(-8) + 5
C.-7,5 + 2,5+(-3) d. 24+ (-50) + 16



svp pouvez vous m'aider​
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