October 2020 0 83 Report
EXERCICE V: Calcule mentalement et astucieusement 1) 35 + 9; 57 + 99 ; 18 + 19 ; 312 + 999
2) 48 - 9 ; 65 – 9; 216 - 99 ; 35 – 19; 1 534 – 999
3) 3213 + 397 ; 789 – 298
Merci d avance
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