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

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We are 16 pupils. HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

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

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

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16 pupils equal 16 minutes. 16 x 1= 16 min. (16 pupils multiplied by 1 minute is 16 minutes) In 1 minute, 3.450 L come out of the tap. 1 L= 1000 mL.3 L= 3 X 1000 = 3000 mL. 3.450 L = 3 L and 450 mL. 3000 mL + 450 mL = 3,450 mL. HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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If in 1 minute 3,450 mL come out of the tap, in 16 minutes … 3,450 X 16 = … mL 3,450 X16 2070 345 55,200 3,00040050 1030,0004,00050034,500 618,0002,40030020,700 55,200 mL = 55 L and 200 mL HOW TO SAVE WATER: What happens if we do not turn off the tap on time? Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 0 3 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 70 2 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 2070 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 2070 5 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 2070 45 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 2070 345 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 2070 345 0 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 2070 345 00 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 2070 345 200 1 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 2070 345 5200 1 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 2070 345 55200 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,450 X16 2070 345 55,200 mL = 55 L and 200 mL HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL First, we split 3,450 into thousands,hundreds, tens and units : 3,000400500+++ Secondly, we split 16 into tens and units : 106+ HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL Now, we locate each number in a cell: 3,450 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 Now, we locate each number in a cell: 3,450 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 10 6 Now, we locate each number in a cell: 16 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 103,000 X 10 6 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,000 6 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,000400 X 10 6 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000 6 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,00050 X10 6 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 6 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 63,000 X 6 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 618,000 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 618,000400 X 6 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 618,0002,400 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 618,0002,40050 X 6 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 618,0002,400300 Afterwards, we multiply each column by each file: HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 618,0002,400300 Now, we sum each file: ++= 34,500 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 618,0002,400300 Now, we sum each file: ++= 34,500 ++ = 20,700 HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 618,0002,400300 Finally, we sum the last column: ++= 34,500 ++ = 20,700 + HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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3,450 X 16 = … mL 3,00040050 1030,0004,000500 618,0002,400300 Finally, we sum the last column: ++= 34,500 ++ = 20,700 55,200 mL 55 L and 200 mL + HOW TO SAVE WATER: What happens if we do not turn off the tap on time? © Noèlia Callau Codorniu March 2008

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

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

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

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