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Calcul mental mutiplier par 20 ou 30

Author: Connan Jean-Yves
Description:
Keywords: , , , , , , online teaching

Content:
Definitions:
0. 4 X 20
1. 8 X 20
2. 5 x 30
3. 6 X 20
4. 7 X 30
5. 2 X 20
6. 9 x 30
7. 7 X 20
8. 3 X 20
9. 5 X 20
10. 3 X 30
11. 0 x 30
12. 10 X 20
13. 1 x 30
14. 9 X 20
15. 1 X 20

Answers:
0. 140
1. 90
2. 120
3. 270
4. 60
5. 150
6. 30
7. 40
8. 80
9. 0
10. 100
11. 180
12. 210
13. 200
14. 20
15. 160
.