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

HOW TO SAVE WATER: What happens if we do not turn off the tap on time?

Noèlia Callau Codorniu March 2008

LESSON 4

We are16 pupils.



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.


© Noèlia Callau Codorniu March 2008

If in 1 minute 3,450 mL come out of the tap,

in 16 minutes …

3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0

3 4 5

5 5, 2 0 0

3,000 400 50

10 30,000 4,000 500 34,500

6 18,000 2,400 300 20,700

55,200mL = 55 L and 200 mL



3,450 X 16 = … mL

3, 4 5 0

X 1 6



3,450 X 16 = … mL

3, 4 5 0

X 1 6

0

3



3,450 X 16 = … mL

3, 4 5 0

X 1 6

7 0

2



3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0



3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0

5



3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0

4 5



3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0

3 4 5



3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0

3 4 5

0



3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0

3 4 5

0 0



3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0

3 4 5

2 0 0

1



3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0

3 4 5

5 2 0 0

1



3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0

3 4 5

5 5 2 0 0



3,450 X 16 = … mL

3, 4 5 0

X 1 6

2 0 7 0

3 4 5

5 5, 2 0 0 mL = 55 L and 200 mL



3,450 X 16 = … mL

First, we split 3,450 into

thousands, hundreds, tens and units:

3,000 400 50 0 + + +

Secondly, we split 16 into

tens and units:

10 6 + HOW TO SAVE WATER: What happens if we do not turn off the tap on time?


3,450 X 16 = … mL

Now, we locate each number in a cell:

3,450



3,450 X 16 = … mL

3,000 400 50


3,450



3,450 X 16 = … mL

3,000 400 50

10

6


16 HOW TO SAVE WATER: What happens if we do not turn off the tap on time?


3,450 X 16 = … mL

3,000 400 50

10 3,000 X 10

6

Afterwards, we multiply each column by each file:



3,450 X 16 = … mL

3,000 400 50

10 30,000

6




3,450 X 16 = … mL

3,000 400 50

10 30,000 400 X 10

6




3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000

6




3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 50 X10

6




3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6




3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6 3,000 X 6




3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6 18,000




3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6 18,000 400 X 6




3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6 18,000 2,400




3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6 18,000 2,400 50 X 6




3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6 18,000 2,400 300




3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6 18,000 2,400 300

Now, we sum each file:

+ + = 34,500



3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6 18,000 2,400 300

Now, we sum each file:

+ + = 34,500

+ + = 20,700



3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6 18,000 2,400 300

Finally, we sum the last column:

+ + = 34,500

+ + = 20,700+



3,450 X 16 = … mL

3,000 400 50

10 30,000 4,000 500

6 18,000 2,400 300

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...

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