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Calcul mental mutiplier par 20 ou 30

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

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

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