Year 6 Maths

Autumn term
Block A
Lesson 3

How to order decimal numbers to (2 d.p)

Look at the direction that you need to order in, ascending or descending.
Place in ascending order   1.28  1.39  1.12  1.21  1.20

If ascending look for the smallest number first, by comparing the first digit of each number.
So the smallest number is     18

-If you have more than one number starting with the same digit, you then need to compare the next set of digits in those numbers ie-   15 12 would become 12 15

So you now have 18 followed by 19, repeat the process until all the numbers are used.

So the ascending order is    18  19  20  21  22

If descending look for the largest number first, by comparing the first digit of each number.
So the largest number is     22

-If you have more than one number starting with the same digit, you then need to compare the next set of digits in those numbers ie-    15 12 would stay as 15 12 as 5 is larger than 2 in descending order.

So you now have 22 followed by 21, repeat this process until all the numbers are used.

So the descending order is 22  21  20  19  18