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Calcul mental mutiplier par 20 ou 30

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

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

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