2. Remember and think ! Some children wasted 1,350 mL brushing their teeth; i.e 1L 350 mL. It took 30 seconds wasting those millilitres. HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008 LESSON 7

3. Remember and think ! HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

4. Remember and think ! HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

5. Water wasted in 30 sec.= 1,350 mL = 1L 350 mL. 1 min. = sec. 60 = 30 x 60:30 = 60 2 2 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

6. If in 30 seconds we wasted 1,350 mL, in 1 minute we would waste… 1 min. = 60 sec. = 30 x 2 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

7. 1,350 mL x 2 = 1,350 X2 1,00030050 2 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

8. 1,350 X2 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

9. 1,350 X2 0 1 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

10. 1,350 X2 70 1 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

11. 1,350 X2 270 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

12. 1,350 X2 2,700 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

13. 1,350 mL x 2 = 1,00030050 2 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

14. We locate each number in a cell: 1,350 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

15. 1,00030050 1,350 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

16. 1,00030050 2 16 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

17. 1,00030050 21,000 X 2 We multiply each column by each row: 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

18. 1,00030050 22,000 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

19. 1,00030050 22,000300 x 2 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

20. 1,00030050 22,000600 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

21. 1,00030050 22,00060050 x 2 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

22. 1,00030050 22,000600100 1,350 mL x 2 = HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

23. 1,350 mL x 2 = 1,00030050 22,000600100 ++= 2,700 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

24. Multiplying 1,350 mL by 2 is 2,700 mL That is 2L and 700 mL of wasted water If we turned off the tap on time, we would save 2L and 700mL of water. HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

25. 2L and 700 mL HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

26. Click on the image to check. … in a swimming pool ?… in a trailer ? … in a tanker ? HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

27. Click on the image to check. … in huge tanks ? … in a big tank ? HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

28. Click on the image to check. … in a medium tank ? … in a small tank ? … in a tiny tank ? HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

29. Click on the image to check. … in a bottle ? … in a bowl ? … in a bucket ? HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

30. Oh no!!!

34. HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

35. HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008