calcul mental 03/12
Elisa DRAUX
Created on October 26, 2024
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Transcript
87 - 9 =
87-9 = 78
78
77
- 10
87
+ 1
453 - 9 =
453-9 = 444
444
443
- 10
453
+ 1
756 - 90 =
756-90 = 666
666
656
- 100
756
+ 10
834- 99 =
834-99 = 735
735
734
-100
834
+ 1