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Remember and think !. LESSON 7. 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? - PowerPoint PPT Presentation
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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
Remember and think !
HOW TO SAVE WATER: What happens if we do not turn off the tap on time?
Noèlia Callau Codorniu March 2008
Remember and think !
What can I do to find it out?
How do I know?
What do I have to takeinto account?
HOW TO SAVE WATER: What happens if we do not turn off the tap on time?
Noèlia Callau Codorniu March 2008
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
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
1,350 mL x 2 =
1,
3 5 0
X 2
1,000 300 50
2
HOW TO SAVE WATER: What happens if we do not turn off the tap on time?
Noèlia Callau Codorniu March 2008
1,
3 5 0
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
1,
3 5 0
X 2
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
1,
3 5 0
X 2
7 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
1,
3 5 0
X 2
2 7 0
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
1,
3 5 0
X 2
2,
7 0 0
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
1,350 mL x 2 =
1,000 300 50
2
HOW TO SAVE WATER: What happens if we do not turn off the tap on time?
Noèlia Callau Codorniu March 2008
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
1,000 300 50 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
1,000 300 50
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
1,000 300 50
2 1,000 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
1,000 300 50
2 2,000
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
1,000 300 50
2 2,000 300 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
1,000 300 50
2 2,000 600
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
1,000 300 50
2 2,000 600 50 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
1,000 300 50
2 2,000 600 100
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
1,350 mL x 2 =
1,000 300 50
2 2,000 600 100+ + = 2,700
HOW TO SAVE WATER: What happens if we do not turn off the tap on time?
Noèlia Callau Codorniu March 2008
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
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
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
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
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
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
Oh no!!!
Oh no!!!
Oh no!!!
Oh no!!!
HOW TO SAVE WATER: What happens if we do not turn off the tap on time?
Noèlia Callau Codorniu March 2008
HOW TO SAVE WATER: What happens if we do not turn off the tap on time?
Noèlia Callau Codorniu March 2008