 St Paul's C of E Primary School

Heathside Grove

LEARNING to make a difference

# Wednesday 21st October

L.O: To order and compare numbers.

Sometimes, you will have to put numbers in order. It might be from the smallest to the largest, or it might be ordering them from the largest to the smallest.

When the numbers have the same number of digits, you can follow this simple method:

1) Choose the number with the smallest first digit and put that first.

2) Then look at the rest of the numbers and choose the one with the smallest first digit from them.

3) Repeat this until you have sorted all the numbers.

4) If any of the numbers have the same first digit, look at the next digit in the number. Order the numbers by that digit.

e.g Here are some numbers that each have 2 digits.

42   24   64   48   53

Following the method above, I can see that the smallest first digit is 2 for the 24. So 24 goes first.

Then I can see the next smallest digit is 4 - but there are two numbers with 4 as the first digit. So now we need to look at the next digit. 2 is smaller than 8 so 42 will go next, followed by 48.

The next smallest first digit is 5 for 53 followed by 6 for 64.

24   42   48   53   64

Have a go at ordering these numbers from the smallest to the largest.

35   27   24    13    43

Now try ordering these numbers from the largest to the smallest.

34    42    13    23    24

Be careful when ordering numbers with different amount of digits. Like this:

34   32    234    23    134    12

Here, you need to sort them into groups first. Get all the 2 digit numbers together and then the 3 digit numbers together so it is easier to sort.

Try ordering the numbers above from the smallest to the largest.

Now try ordering the following numbers from the largest to the smallest.

34   46   233    23    123    134

Now try completing page 10 and 11 in your in Maths targeted question book.

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