WALT

1 / 21

# WALT - PowerPoint PPT Presentation

WALT. Partition Order Round whole numbers and decimals with up to 2 d.p. Partitioning. Every number sits in it’s own column. M 100 Th 10 th Th H T U 7 9 0 4 6 2 700 000 + 90 000 + 400 + 60 + 2 = 790 462. Question 1 Partitioning. 7 9 0 4 6 2 In your jotter show the value of: 6

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about ' WALT' - wilda

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

### WALT

Partition

Order

Round

whole numbers and

decimals with up to 2 d.p.

Partitioning

Every number sits in it’s own column.

M 100Th 10th Th H T U

79046 2

700 000 + 90 000 + 400 + 60 + 2 = 790 462

Question 1 Partitioning

79046 2

In your jotter show the value of:

• 6
• 9
• 0
• 2
• 7
• 4
Partitioning

• 60
• 90 000
• 0
• 400
• 7 000 000
• 400
Partitioning with decimals H T U . 1/101/100

7 . 9

7 . 9 0

These two numbers are the same. Zeros written at the end of the complete number after the decimal point do not alter the value of the whole number.

You will need to remember this for the ordering activity.

Partitioning with decimalsH T U . 1/101/100

3 04 . 15

In your jotter show the value of:

• 0
• 4
• 3
• 1
• 5
Partitioning with decimals

• 0
• 4 units
• 3 hundreds
• 1 tenth
• 5 hundredths
Ordering

Once you know the value of each digit, you can put numbers in order according to their size.

When working with whole numbers, put them in order by lining up the units column.

Ordering

When working with whole numbers, put them in order by lining up the units column.

263

6 032

2 630

32

Try doing this in your jotter.

They should now look like this

263

6 032

2 630

32

Now you can easily see that the order is

32

263

2 630

6 032

Ordering
Ordering

In your jotter write these numbers in order starting with the smallest.

• 724 2974 972

724 972 2974 4927

Ordering

When you use decimal numbers, it can be a bit more complicated to begin with.

First make sure that all the numbers have the same number of digits after the decimal point.

23.4 3.42 43.2 324

These can all be written with 2 decimal points

23.40 3.42 43.20 324.00

If you then write the numbers in a vertical list with the decimal points lined up you can easily see the order.

23.40

3.42

43.20

324.00

Written in order from smallest to largest the numbers should read:

3.42

23.40

43.20

324.00

Ordering
In your jotter write these decimal numbers in order starting with the largest.

6.78 876 78.6 8.67

876

78.6

8.67

6.78

Ordering
Rounding

Rounded numbers are used all the time in every day life.

The number of marbles in a bag can be rounded to the nearest 10.

Rounding

The number of sheep in a flock

could be rounded to the nearest 100

Rounding

The number of runners in the London Marathon

can be rounded to

the nearest 1000

On your whiteboard, round these numbers to the nearest 10

243

3892

456

7295

5999

240

3890

460

7300

6000

Rounding
Decimal numbers can be rounded to the nearest whole number, especially in the case of money or measure.

£1.99 can be rounded to £2

4 m 35 cm can be rounded to 4 m

Rounding decimals

£4.99

£8.42

£3.67

£9.75

£12.50

£5

£8

£4

£10

£13

Rounding decimals
Plenary

You have been learning to partition, order and round whole numbers and decimals with up to 2 d.p.

Do you understand what each of these words mean?

Can you suggest examples from real life where it might be useful to be able to partition, order or round large numbers or numbers involving decimals?