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Calcul mental mutiplier par 20 ou 30

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

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

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